1. Home
  2. India's Biggest Diseases

India's Biggest Diseases: Why They Are High, and What Works

Diabetes, high blood pressure and heart disease, tuberculosis, tobacco and infection-linked cancers, and anaemia: the reasons, the countries that do better, and the programmes that work.

Key Points
  • Five conditions dominate: diabetes, high blood pressure and heart disease, TB, tobacco- and infection-linked cancers, and anaemia.
  • India's age-adjusted diabetes rate (10.5%) is below the world average and the US[1]; the problem is risk at lower body weight[2] and late diagnosis[3].
  • India has a quarter of the world's TB[4].
  • Air pollution (21 lakh deaths in 2021[5]) and untreated mental illness (70–92% treatment gap[6]) add two more large burdens.
  • Countries that do better find people early, treat simply and follow up.

The Five, Side by Side

ConditionIndia's burdenMain reasonsWho does better, and how
Diabetes8.98 crore adults; 43% undiagnosed[3]Risk at lower body weight, carbohydrate-heavy diet, late diagnosisNetherlands, Sweden, France, UK: lower prevalence; lifestyle programmes cut new cases by 58% in trials[7]
High blood pressure and heart disease31.5 crore with high blood pressure[8]; heart disease causes 31% of deaths[9]Undiagnosed, untreated, or treated but not controlledSouth Korea, Canada, Iceland: more than half controlled[10]
Tuberculosis27.1 lakh cases and more than 3 lakh deaths in 2024; 25% of the world's cases[11]Undernutrition, diabetes, smoking, alcohol, HIV, crowdingUnited States: 3.1 cases per lakh people[12]
Tobacco and infection-linked cancers26.68 crore tobacco users[13]; oral and cervical cancer among the most commonSmokeless tobacco; HPV without vaccination or screeningAustralia: on track to eliminate cervical cancer by 2035[14]
Anaemia67.1% of young children, 57% of women[15]Iron deficiency, diet, worms, and other causesRose between the last two national surveys, so India's own programme matters most

Diabetes

8.98 croreAdults aged 20 to 79 with diabetes in 2024, about 1 in 7 of the world's totalIDF Diabetes Atlas 2025[3]
43%Of them undiagnosed, about 3.86 crore peopleIDF Diabetes Atlas 2025[3]
15.67 croreProjected for 2050, a 75% increaseIDF Diabetes Atlas 2025[3]

The ICMR-INDIAB study, using its own survey and definitions, estimated 10.1 crore people with diabetes and another 13.6 crore with prediabetes[8]. The two estimates differ in method and age range; both say the same thing about scale.

Is India's Diabetes Rate Unusually High?

Not compared with other large countries. Once ages are adjusted so countries can be compared fairly, India's rate is below the world average and below the United States'. Several European countries are much lower.

Pakistan31.4%
United States13.7%
Bangladesh13.2%
China11.9%
World average11.1%
India10.5%
Japan8.1%
United Kingdom7.4%
France6.5%
Sweden5.8%
Netherlands5.0%
Figure 1. Age-adjusted share of adults (20 to 79) with diabetes, 2024[1]. Drawn on a 0 to 35% scale. The US, which spends more on healthcare than any other country, has a higher rate than India; so does Pakistan, India's neighbour. Healthcare spending alone does not explain the gap.

Why Pakistan Is Highest

Pakistan has the world's highest adult diabetes rate. Its doctors and policy researchers point to sedentary lives (41.4% of people, and 53.7% of women, miss WHO activity guidelines), carbohydrate- and sugar-heavy diets, no control of free sugars or industrial trans fats, fast urbanisation, and genetic risk deepened by marriage between close relatives; more than a third of cases are undiagnosed[16]. Several of these apply to parts of India too.

Why India's Problem Is Still Serious

  1. BODYRisk at lower weightA South Asian at BMI 23.9 has the diabetes risk of a white person at BMI 30
  2. DIETCarbohydrate-heavy62% of calories from carbohydrates; refined cereals and added sugar raise the odds
  3. DETECTIONFound late43% do not know they have it
  4. RESULTDamage before diagnosisHeart, kidney, eye and nerve damage can start before treatment does
Figure 2. How diabetes builds up in India. Sources: BMI equivalence from a study of 1.47 million people in England[2]; diet from the ICMR-INDIAB study of 1,21,077 adults[17]; undiagnosed share from the IDF[3].
  • Body type. Standard obesity cut-offs miss South Asians. In England, the diabetes risk a white adult has at a BMI of 30 is reached by South Asian adults at 23.9[2]. Many Indians who look slim are at risk.
  • Diet. Indians get 62% of their calories from carbohydrates and about 12% from protein. Refined cereals were linked to 13% higher odds of diabetes, and added sugar to 14% higher odds; added sugar exceeded the national limit of 5% of calories in 21 states and union territories[17]. It is not only sugar: white rice and refined wheat matter as much.
  • Late diagnosis. Nearly half of people with diabetes have not been diagnosed[3].

What Works, with Evidence

MeasureWhereResult
Intensive lifestyle programme for people at high riskFinland (2001) and the United States (2002)58% fewer new cases of diabetes in both trials[7]
Tax on sugary soft drinksUnited Kingdom, from April 2018Manufacturers cut sugar: drinks liable for the levy fell from 52% to 15% of eligible drinks[18]
Screening everyone over 30 and standard treatmentIndia, NP-NCD and the 75 by 25 initiative2.53 crore people with diabetes on treatment under the initiative[19]

High Blood Pressure and Heart Disease

Cardiovascular disease causes 31% of all deaths in India, more than any other cause[9]. High blood pressure is its biggest driver, and 31.5 crore Indians have it[8]. The problem is rarely the medicine; cheap, effective tablets exist. The problem is the chain from diagnosis to lasting control.

South Korea, Canada, Icelandmore than 50% controlled
India, IHCI districts, 2023–2448% controlled
India, IHCI districts, 2018–1937% controlled
World average, womenabout 23% controlled
World average, menabout 18% controlled
Figure 3. Share of people with high blood pressure whose blood pressure is controlled. World and best-country figures are for 2019[10]; India figures are for people treated in public facilities in nine districts of the India Hypertension Control Initiative, not national rates[20]. The bars for the best countries show the threshold of 50%, not an exact value.

What the Best Countries and India's Best Districts Do

  • Find people. Worldwide in 2019, 41% of women and 51% of men with high blood pressure had not been diagnosed[10].
  • Treat by a simple protocol. India's Hypertension Control Initiative uses a fixed drug-and-dose protocol, free medicines and care close to home. In its districts, control rose from 37% to 48%, and the share of patients paying for medicines fell from 47% to 9%[20].
  • Keep them on treatment. Under the 75 by 25 initiative, 4.20 crore people with high blood pressure were on standard treatment[19].

Countries That Cut Heart Disease Deaths, and How

WhereWhat they changedResult
North Karelia, Finland (from 1972)Less butter and fatty dairy, more vegetables; community blood-pressure screening and a hypertension register with nurse clinics; salt reduction with food companies; tobacco law and quit programmesCoronary deaths in the middle-aged fell 84% by 2014; about two-thirds of the fall came from risk-factor change[21]
England (2003–2011)Salt targets for processed foodSalt intake down 15% (9.5 to 8.1 g a day); blood pressure down 3/1.4 mm Hg; stroke deaths down 42% and heart disease deaths down 40% over the period, not all due to salt[22]

India's Own Levers

RiskWhere India isWhat is being done
SaltAbout 11 g a day, 2.2 times the WHO limit of 5 g[23]ICMR's Project Namak is testing low-sodium salt in Punjab and Telangana[23]
TobaccoAdult use fell from 34.6% (2009–10) to 28.6% (2016–17); smoking from 14.4% to 10.7%[24]Tobacco control laws and warnings; smokeless tobacco remains the larger problem
Trans fatIndustrial trans fat was allowed up to 5% of oils and fatsCapped at 2% from 1 January 2022[25]
Diet62% of calories from carbohydrates; added sugar above guideline in 21 states[17]Guidance only so far

Control depends on follow-up: the next doctor must know the dose that was working. That is a record problem.

Tuberculosis

25%India's share of the world's new TB cases in 2024, and 28% of TB deathsWHO Global TB Report 2025[4]
237 → 187New cases per lakh people, 2015 to 2024, a 21% fall; deaths down 28%WHO Global TB Report 2025[11]
92%Estimated cases diagnosed and put on treatment in 2024, up from 53% in 2015WHO Global TB Report 2025[11]
3.1New cases per lakh people in the United States in 2024CDC[12]
India, 2015237 per lakh
India, 2024187 per lakh
United States, 20243.1 per lakh
Figure 4. New TB cases per lakh people. India's rate is about 60 times that of the United States[11][12].

Why TB Stays High in India

WHO names five drivers of TB: undernutrition, HIV, diabetes, smoking and alcohol use disorders[4]. India has all five at scale, along with crowded housing that spreads infection. In the United States, 77% of cases are in people born abroad, and the rate among US-born people is 0.8 per lakh[12]: where nutrition and housing are good and cases are found fast, TB nearly disappears.

What Works

MeasureEvidence or status
Food for patients and their familiesThe RATIONS trial in Jharkhand gave households monthly rice and pulses: TB among family contacts fell by about 40%, and by nearly 50% for infectious TB[26]
Cash support during treatmentNi-kshay Poshan Yojana raised support to ₹1,000 a month for all TB patients in 2024, with extra nutrition for about 12 lakh underweight patients[27]
Finding and treating every caseTreatment coverage rose from 53% to 92% between 2015 and 2024[11]

Cancers Driven by Tobacco and Infection

India has far fewer new cancers per person than Denmark or Australia (about 98 against 350 per lakh, age-adjusted)[28], yet about 3 in 5 Indians diagnosed with cancer die of it[29], and India's cancer death rate rose about 21% between 1990 and 2023 while the world's fell[30]. The difference is late diagnosis: only 1.9% of Indian women have ever been screened for cervical cancer[31]. How other countries changed this.

Tobacco and Oral Cancer

Any tobacco, men42.4%
Any tobacco, all adults28.6% · 26.68 crore people
Smokeless tobacco21.4% · 19.94 crore
Smoking10.7% · 9.95 crore
Figure 5. Tobacco use among adults aged 15 and over, GATS-2, 2016–17[13]. India's tobacco is mostly chewed, not smoked. Lip and oral cavity cancer is the most common cancer in Indian men[32].

Cervical Cancer: A Cancer That Can Be Eliminated

Cervical cancer is caused by HPV infection, so it can be prevented by vaccination and caught early by screening. Australia began HPV vaccination in 2007, moved to HPV-based screening, recorded no cervical cancer in women under 25 in 2021, and is on track to eliminate the disease as a public health problem by 2035. Even there, vaccination coverage has slipped to just under 80% and screening participation is falling[14].

India began a nationwide single-dose HPV vaccination drive for 14-year-old girls in 2026, aiming to reach the 1.15 crore girls who turn 14 each year. Ministry officials cite nearly 80,000 new cases and more than 42,000 deaths a year[33].

Anaemia

GroupNFHS-4 (2015–16)NFHS-5 (2019–21)
Children, 6 to 59 months58.6%67.1%
Women, 15 to 4953.1%57.0%
Pregnant women50.4%52.2%
Men, 15 to 4922.7%25.0%

Source: National Family Health Survey[15]. Anaemia rose in every group between the two surveys.

India's Anaemia Mukt Bharat programme, launched in 2018, combines six interventions for six age groups: iron and folic acid supplements, deworming, year-round behaviour change, digital testing and treatment, fortified foods in government programmes, and treatment of non-nutritional causes where they are common[34]. Anaemia in pregnancy raises the risk of bleeding and of low birth weight, which is why a mother's haemoglobin belongs in her record.

Two More Large Burdens: Air Pollution and Mental Health

Air Pollution

21 lakhDeaths in India linked to air pollution in 2021State of Global Air 2024[5]
1,69,400Children under five in India whose deaths were linked to air pollution in 2021, the highest of any countryState of Global Air 2024[5]

Air pollution is not a disease but a risk factor behind heart disease, stroke, lung disease and childhood pneumonia. Fine particles from burning fossil fuels and biomass cause most of the harm[5]. For a doctor, the useful record is the patient's exposure (cooking fuel, occupation) alongside the diagnosis.

Mental Health

10.6%Adults in India with a mental disorderNational Mental Health Survey 2015–16[6]
70–92%People with a mental disorder who receive no treatment, depending on the disorderNational Mental Health Survey[6]

Mental illness can first appear in a general clinic as headache, sleeplessness or body pain. A record that shows the pattern across visits helps the doctor recognise it.

The Common Thread

  1. 1PreventDiet, tobacco control, vaccination, nutrition
  2. 2Find earlyScreening; nearly half of diabetes is undiagnosed
  3. 3Treat simplyStandard protocols and free medicines
  4. 4Follow upThe next doctor knows what was tried and what worked
Figure 6. What the countries and Indian programmes that succeed have in common.

India already runs serious programmes for every one of these conditions. Where they work, it is because each patient is found, treated and followed up. Follow-up is where a missing record does the most damage, and it is the step 1Heath is built for: a record written at every visit, from the conversation, that the next doctor can see.

Sources

  1. International Diabetes Federation. Diabetes Atlas, age-adjusted comparative prevalence of diabetes (20 to 79 years), 2024. diabetesatlas.org
  2. Caleyachetty R, et al. Ethnicity-specific BMI cutoffs for obesity based on type 2 diabetes risk in England. Lancet Diabetes and Endocrinology, 2021 (University of Warwick release). warwick.ac.uk
  3. IDF Diabetes Atlas, 11th edition (2025): key takeaways for India, as reported by Medical Dialogues. medicaldialogues.in
  4. WHO Global Tuberculosis Report 2025: country shares and risk factors, as reported by Business Standard, November 2025. business-standard.com
  5. State of Global Air 2024 report, as reported by The Tribune, June 2024. tribuneindia.com
  6. National Mental Health Survey 2015-16, as cited in the Economic Survey 2023-24 (Asianet Newsable). newsable.asianetnews.com
  7. Finnish Diabetes Prevention Study (NEJM 2001) and US Diabetes Prevention Program (NEJM 2002), summary by Wiki Journal Club. wikijournalclub.org
  8. ICMR-INDIAB study group. Metabolic non-communicable disease health report of India: the ICMR-INDIAB national cross-sectional study. Lancet Diabetes and Endocrinology, 2023. Figures as reported by M3 India. m3india.in
  9. Office of the Registrar General of India. Sample Registration System, Causes of Death 2021 to 2023, as reported by Business Standard, 5 September 2025. business-standard.com
  10. NCD Risk Factor Collaboration. Worldwide trends in hypertension prevalence and progress in treatment and control, The Lancet, 2021 (Luxembourg Institute of Health summary). lih.lu
  11. WHO Global Tuberculosis Report 2025: India figures, as reported by Medical Dialogues. health.medicaldialogues.in
  12. US Centers for Disease Control and Prevention. Tuberculosis surveillance report 2024: executive commentary. cdc.gov
  13. Global Adult Tobacco Survey 2 (GATS-2), India 2016-17: fact sheet. nhm.uk.gov.in
  14. University of Sydney. Australia on track to eliminating cervical cancer, 20 November 2025. sydney.edu.au
  15. National Family Health Survey 5 (2019-21) anaemia results, as reported by Down To Earth. downtoearth.org.in
  16. Health Policy Watch. Pakistan has the world's highest diabetes prevalence and lacks focus on prevention. healthpolicy-watch.news
  17. ICMR-INDIAB diet study, Nature Medicine, 30 September 2025, as reported by Down To Earth. downtoearth.org.in
  18. Scarborough P, et al. Impact of the UK Soft Drinks Industry Levy on soft drink sugar content. PLoS Medicine, 2020 (University of Warwick release). warwick.ac.uk
  19. Rajya Sabha reply on the 75 by 25 initiative, as reported by Medical Dialogues, 2025. health.medicaldialogues.in
  20. Resolve to Save Lives. Evidence from India demonstrates progress in hypertension control (India Hypertension Control Initiative). resolvetosavelives.org
  21. The North Karelia Project: cardiovascular disease prevention in Finland (review, PMC). pmc.ncbi.nlm.nih.gov
  22. He FJ, Pombo-Rodrigues S, MacGregor GA. Salt reduction in England from 2003 to 2011. BMJ Open, 2014 (MedicalResearch.com summary). medicalresearch.com
  23. ICMR-National Institute of Epidemiology on salt intake and Project Namak, Medical Dialogues, July 2025. health.medicaldialogues.in
  24. GATS-1 (2009-10) and GATS-2 (2016-17) comparison, Governance Now. governancenow.com
  25. FSSAI caps trans fatty acids in food to 2 per cent by 2022, Outlook Business. outlookbusiness.com
  26. RATIONS trial (The Lancet, 2023), as reported by Telangana Today. telanganatoday.com
  27. The Tribune. Health Ministry enhances monthly support for TB patients, October 2024. tribuneindia.com
  28. World Cancer Research Fund. Global cancer data by country (GLOBOCAN 2022 age-standardised rates). wcrf.org
  29. ICMR study in Lancet Regional Health Southeast Asia, February 2025, as reported by Medical Dialogues. medicaldialogues.in
  30. GBD Cancer Collaborators, The Lancet, 25 September 2025, as reported by ThePrint. theprint.in
  31. National Family Health Survey 5 (2019-21) cancer screening, as reported by ThePrint. theprint.in
  32. The Wire. Over 14 lakh new cancer cases and 9 lakh deaths in India in 2022: WHO (GLOBOCAN 2022). thewire.in
  33. ThePrint. Centre's HPV vaccine drive for 14-year-old girls, 25 February 2026. theprint.in
  34. The Week. Anaemia Mukt Bharat: how India fights anaemia, 24 April 2025. theweek.in