A parent in Kerala notices small red spots on her 3-year-old's palms after she comes back from playschool with a low fever. Within 24 hours, the spots have multiplied — they are now on the soles of her feet, around her mouth, and the toddler refuses to eat or drink because of the painful ulcers on her tongue. The paediatrician calls it hand, foot and mouth disease, but in Kerala newspapers it is splashed under a more dramatic name — tomato flu. Every monsoon, schools and creches across India see clusters of these cases, and parents flood paediatric clinics with the same anxious questions. This guide breaks down what HFMD really is, how it spreads, what symptoms to watch for, when to worry, and how to protect your family — with India-specific context that generic websites miss.
What Is HFMD and Why Is It Called "Tomato Flu" in India?
Hand, foot and mouth disease (HFMD) is a contagious viral infection caused mainly by enteroviruses — most commonly Coxsackievirus A16 and Enterovirus 71 (EV-A71). It typically affects children under the age of 5, though older children and adults can occasionally catch it too. The illness is characterised by a fever followed by painful sores in the mouth and a distinctive rash on the hands and feet.
The name "tomato flu" emerged in May 2022 when a cluster of cases was reported in Kollam, Kerala, with over 80 children affected. Health correspondents described the blisters as red, raised, and painful — "the size and shape of tomatoes" — and the term stuck in regional and national media. Subsequent investigations by the Indian Council of Medical Research (ICMR) and a paper published in Public Health Challenges concluded that "tomato flu" is not a new disease but is most likely a clinical variant of HFMD caused by Coxsackievirus A6 or A16. Calling it "tomato flu" makes for vivid headlines but is medically misleading — the underlying illness is the same HFMD that paediatricians have been managing for decades.
A Note on Confusion With Other Conditions
HFMD is sometimes confused with foot and mouth disease in cattle — these are completely different viruses, and HFMD does not jump between humans and farm animals. It is also distinct from chickenpox, which causes itchier, more widespread vesicles rather than the localised palmoplantar rash of HFMD.
How HFMD Spreads in Indian Schools and Homes
HFMD is highly contagious and spreads with frightening efficiency in environments where young children share toys, mats, water bottles, and meal trays — exactly the conditions in most Indian playschools, anganwadis, and joint-family households.
The virus spreads through:
- Respiratory droplets from coughs and sneezes
- Saliva transferred via shared cups, bottles, or pacifiers
- Fluid from the blisters when they burst
- Stool — the virus is shed in faeces for up to 4–6 weeks after recovery, which is why hand-washing after nappy changes is critical
- Contaminated surfaces — toys, doorknobs, swing handles, books
The incubation period is 3–7 days — meaning your child may pick up the virus at school on Monday and develop fever by Friday. Children are most contagious during the first week of illness but can continue shedding virus in stool for over a month, which is the main reason outbreaks linger in daycare centres.
Symptoms: What Parents in India Should Look For
The illness typically unfolds in two phases.
Phase 1: Prodromal (Days 1–2)
- Low to moderate fever (38–39°C / 100–102°F)
- General irritability, fatigue, loss of appetite
- Sore throat
- Sometimes a mild runny nose
Phase 2: Rash and Ulcers (Days 2–5)
- Painful mouth ulcers (herpangina) on the tongue, gums, inside of cheeks, soft palate — these are the single most distressing symptom for the child
- Red, raised spots on the palms and soles that turn into small blisters or vesicles
- Rash often extends to the buttocks, groin, knees, and elbows
- Blisters may also appear around the mouth, lips, and the diaper area in infants
- Drooling, refusal to drink, and sleep disturbance — because every swallow hurts
The illness is typically self-limiting and resolves in 7–10 days. The fever usually breaks by day 3, but the mouth ulcers can take up to a week to heal completely. In some children, fingernails and toenails may shed (onychomadesis) about 4–6 weeks after recovery — this is harmless and the nails grow back normally.
Symptoms in Adults
Adults can get HFMD too, especially parents and grandparents caring for an infected child. Adult HFMD is often milder — many cases present with only a sore throat and a few subtle blisters on the palms or soles — but can occasionally be unusually severe with high fever and extensive rash. Pregnant women who catch HFMD shortly before delivery may pass the virus to the newborn, who can develop a more serious infection.
How HFMD Is Diagnosed
In most cases your paediatrician will diagnose HFMD clinically — the combination of fever, oral ulcers, and the characteristic palm-and-sole rash is so distinctive that no test is needed. Indian government advisories explicitly state that routine laboratory testing is not required for management.
When tests may be ordered:
- RT-PCR for enterovirus on throat swab or stool — done in outbreak investigations or when the child has unusual neurological symptoms
- Complete blood count (CBC) — usually normal, occasionally shows mild lymphocytosis
- CSF analysis — only if meningitis or encephalitis is suspected
Costs at private labs in India: enterovirus PCR ranges from ₹2,500 to ₹6,000 depending on the lab. Most paediatricians will not order this for a typical case.
Treatment: What Works and What Does Not
There is no specific antiviral medicine for HFMD. Treatment is entirely supportive — keep the child comfortable, hydrated, and well-nourished, and let the immune system clear the virus.
What Helps
- Paracetamol (15 mg/kg every 6 hours) for fever and ulcer pain. Paracetamol is preferred over ibuprofen in children under 6 months
- Cold fluids — milkshakes, smoothies, lassi, fresh coconut water, ice chips, popsicles — anything cold soothes the inflamed mouth
- Soft, bland foods — curd rice, ragi porridge, idli with soft chutney (no chilli), mashed banana, dal khichdi without spice
- Topical anaesthetic mouth gels such as Mucopain or Zytee — apply 15 minutes before meals (only as advised by your doctor; avoid in infants)
- Plain water rinses after meals for older children who can spit
- Calamine lotion for itchy skin lesions
What to Avoid
- Citrus juices, tomato, pickle, spicy food — these burn the ulcers
- Hot drinks — they aggravate pain
- Hard, crunchy foods like biscuits, namkeen, or toast
- Antibiotics — HFMD is viral; antibiotics are useless and contribute to antimicrobial resistance
- Steroid creams on the rash unless specifically prescribed
- Aspirin in children — risk of Reye's syndrome
Hydration Is Everything
The single biggest risk in HFMD is dehydration, because the mouth ulcers make swallowing painful and toddlers simply refuse fluids. Offer small sips every 15–20 minutes, switch to chilled drinks, and use ORS (oral rehydration solution) if you notice reduced wet nappies, dry lips, sunken eyes, or excessive sleepiness.
When to Rush to the Hospital
While HFMD is usually mild, EV-A71 in particular can rarely cause serious complications. Seek immediate paediatric review or go to a hospital if your child shows any of these danger signs:
- High fever above 39.5°C lasting more than 3 days
- Severe headache, neck stiffness, sensitivity to light (possible meningitis)
- Persistent vomiting
- Lethargy, drowsiness, or extreme irritability
- Twitching, jerking, or seizures
- Sudden weakness of limbs, unsteady gait, drooping eyelids (signs of brainstem encephalitis)
- Rapid breathing, breathlessness, blue tinge to lips (possible myocarditis or pulmonary oedema)
- Signs of severe dehydration — no urine for 8+ hours, no tears when crying, sunken fontanelle in infants
- Worsening rash that becomes infected (pus, redness, warmth)
A small percentage of EV-A71 cases progress to encephalitis, acute flaccid paralysis, or cardiopulmonary collapse. These complications are rare but can be life-threatening, so erring on the side of caution is wise.
Prevention: Stopping the School-and-Home Cycle
There is currently no licensed vaccine for HFMD in India. Inactivated EV-A71 vaccines are licensed in China and have been highly effective against the most severe form of HFMD, but they are not yet available in the Indian market and do not cover Coxsackievirus strains. Until vaccines arrive, prevention rests entirely on hygiene and isolation.
At Home
- Wash hands with soap and water for 20 seconds — especially after nappy changes, before eating, and after toilet use
- Disinfect toys, doorknobs, light switches, and dining tables daily with diluted bleach (1:50) or alcohol-based wipes
- Do not share utensils, towels, water bottles, or beds with the infected child
- Wash the child's clothes and bed linen separately in hot water
- Continue strict hygiene for at least 4–6 weeks after recovery because of prolonged stool shedding
At School and Playgroup
- Keep your child home for at least 7 days from symptom onset or until all blisters have crusted over
- Inform the school so they can alert other parents and disinfect shared spaces
- Avoid swimming pools, soft-play areas, and birthday parties for 7–10 days
- Many Indian schools now follow Integrated Disease Surveillance Programme (IDSP) advisories that recommend temporary closure of affected classes during outbreaks
Special Caution for Pregnant Women
If you are pregnant and have HFMD or have been exposed to a sick child, inform your obstetrician. Risk to the baby is low overall, but infection near delivery can occasionally cause serious neonatal illness. Practise strict handwashing if caring for a sick toddler at home.
HFMD in India: The Bigger Picture
HFMD has been documented in India since the first reported outbreak in Calicut (Kerala) in 2005. Since then, outbreaks have been recorded across Kerala, Tamil Nadu, Karnataka, Maharashtra, West Bengal, Uttar Pradesh, and Delhi. Most are caused by Coxsackievirus A16 and A6, with EV-A71 detected sporadically. The 2022 Kerala "tomato flu" cluster pushed HFMD onto the national radar and prompted IDSP and state health departments to issue formal advisories.
Climate is a factor. India sees most cases during the monsoon and post-monsoon months (June to October) when humidity favours viral survival on surfaces. Crowded living conditions, shared anganwadi facilities, and the rising number of dual-income families relying on day-care centres all amplify transmission.
The good news: India's child vaccination schedule does not yet include an HFMD vaccine, but research at the National Institute of Virology (NIV) Pune is ongoing. Several international vaccine candidates targeting both EV-A71 and Coxsackievirus strains are in late-stage trials.
Tracking HFMD Episodes Across Your Family
If you have multiple children, or run a small day-care, or live in a joint family, keeping track of who had HFMD, when, and what treatment was given becomes important — both because re-infection with different enterovirus strains is possible, and because some Indian schools now ask for documentation. Upload your paediatrician's notes, fever charts, and any test reports to MedicalVault so the entire family's HFMD history is in one place. The family sharing feature lets both parents and your child's grandparents — often the primary caregivers in Indian households — see what medications were prescribed last time and whether any complications were noted.
Key Takeaways
- HFMD is a common viral childhood illness — the so-called "tomato flu" reported in Kerala is the same disease, not a new infection.
- It spreads rapidly in playschools and joint families via saliva, droplets, blister fluid, and stool, with an incubation period of 3–7 days.
- Look for fever followed by painful mouth ulcers and a rash on the palms, soles, buttocks, and around the mouth.
- There is no specific antiviral; treatment is supportive with paracetamol, cold fluids, soft bland food, and topical anaesthetic gels.
- Watch for danger signs — persistent high fever, lethargy, seizures, weakness, breathing trouble, or dehydration — and seek immediate paediatric care.
- Keep your child home for 7 days from symptom onset, practise strict handwashing, and continue hygiene for 4–6 weeks because of prolonged stool shedding.
- Maintain your family's medical records on MedicalVault so paediatric episodes like HFMD, vaccinations, and recovery notes are accessible to every caregiver.
Always consult a qualified paediatrician for diagnosis and management — early review is especially important for infants under 6 months, children with weakened immunity, or any child showing the danger signs listed above.