Quick Answer: Tomato fever (also called tomato flu) is a viral illness primarily affecting children under 5, causing red, painful blisters that resemble tomatoes. Genomic sequencing during the 2022 Kerala outbreak identified it as Coxsackievirus A6 and A16 — the same enteroviruses behind hand, foot, and mouth disease (HFMD). Many experts regard “tomato flu” as a popular nickname (and something of a misnomer) for ordinary HFMD rather than a distinct new disease. The illness is self-limiting and usually resolves within 7-10 days with supportive care. It’s highly contagious, so isolation and hygiene are important. No specific treatment exists - focus on fever management, hydration, and symptom relief.
What Is Tomato Fever?
Tomato fever is a viral illness that gained attention in India in 2022. It primarily affects young children and is characterized by red, round blisters resembling tomatoes.
Key Facts
| Fact | Details |
|---|---|
| Cause | Coxsackievirus A6 and A16 (enteroviruses that also cause HFMD), confirmed by genomic sequencing during the 2022 Kerala outbreak |
| Age group | Primarily children under 5 years |
| Contagious | Highly contagious |
| Duration | 7-10 days |
| Serious? | Usually mild, self-limiting |
Symptoms of Tomato Fever
Primary Symptoms
| Symptom | Description |
|---|---|
| Red blisters | Round, tomato-like lesions on skin |
| Fever | Often 38-40°C (100.4-104°F) |
| Skin rash | Red patches on body |
| Body pain | Joint and muscle aches |
| Fatigue | Extreme tiredness |
Additional Symptoms
- Dehydration
- Swelling of joints
- Stomach cramps
- Nausea and vomiting
- Diarrhea
- Runny nose
- Coughing
- Mouth ulcers
Where Blisters Appear
| Location | Frequency |
|---|---|
| Hands | Common |
| Feet | Common |
| Buttocks | Common |
| Mouth | Common |
| Knees | Sometimes |
| Elbows | Sometimes |
How Tomato Fever Spreads
Transmission Routes
| Method | Prevention |
|---|---|
| Direct contact | Avoid touching infected person |
| Contaminated surfaces | Clean and disinfect |
| Respiratory droplets | Cover coughs/sneezes |
| Fecal-oral | Proper hand hygiene |
| Shared items | Don’t share utensils, towels |
Who’s at Risk
- Children under 5 years (highest risk)
- Immunocompromised children
- Children in daycare/close contact settings
- Those with poor hygiene practices
Home Care for Tomato Fever
Managing Fever
| Action | Details |
|---|---|
| Paracetamol | Age-appropriate dose for fever |
| Sponging | Lukewarm water (not cold) |
| Light clothing | Don’t overdress |
| Room temperature | Keep comfortable |
Keeping Child Hydrated
| Fluid | Benefits |
|---|---|
| Water | Basic hydration |
| ORS | Replaces electrolytes |
| Coconut water | Natural electrolytes |
| Clear soups | Nutrition + hydration |
| Breast milk | For infants (continue nursing) |
Managing Blisters
| Do | Don’t |
|---|---|
| Keep clean and dry | Pop or scratch blisters |
| Pat dry gently | Rub or irritate |
| Apply calamine lotion (for itching) | Apply harsh chemicals |
| Trim child’s nails | Let child scratch |
Easing Mouth Ulcers
- Offer cold foods (ice cream, cold yogurt)
- Avoid spicy, acidic, or salty foods
- Use straw for drinking if lips are sore
- Ask doctor about topical gels for mouth pain
When to See a Doctor
⚠️ In a baby under 3 months, ANY fever of 100.4°F (38°C) or higher is a medical emergency — see a doctor the same day, even at night. Do not give paracetamol and wait. This applies even after a vaccine.
Seek Immediate Care If:
| Warning Sign | What It May Indicate |
|---|---|
| High fever (>104°F) persisting | Needs evaluation |
| Signs of dehydration | Not urinating, no tears, very dry mouth |
| Difficulty breathing | Needs urgent care |
| Severe lethargy | Child unusually unresponsive |
| Spreading redness around blisters | Possible bacterial infection |
| Seizures | Emergency |
Schedule Doctor Visit If:
- Fever lasts more than 3 days
- Blisters not improving after a week
- Child refusing to eat or drink
- Symptoms getting worse instead of better
- You’re unsure if it’s tomato fever
Treatment
What Doctors Recommend
| Treatment | Purpose |
|---|---|
| Paracetamol (first-line) | Fever and pain relief |
| Antihistamines | Reduce itching (if severe) |
| Calamine lotion | Soothe skin |
| Oral rehydration | Prevent dehydration |
| Rest | Allow body to heal |
Paracetamol is the first-line choice. Ibuprofen should be avoided if the child is dehydrated, vomiting, or not drinking well — exactly the situation tomato fever can cause. Use only the dose your doctor advises.
What’s NOT Needed
| Avoid | Why |
|---|---|
| Antibiotics | Viral infection - antibiotics don’t help |
| Aspirin | Never for children (Reye’s syndrome risk) |
| Home remedies of unknown safety | May cause harm |
Prevention
Hygiene Practices
| Practice | How to Implement |
|---|---|
| Handwashing | Frequently with soap, especially after toilet |
| Surface cleaning | Disinfect toys, doorknobs, tables |
| Don’t share | Personal items, utensils, towels |
| Cover coughs | Teach elbow sneeze/cough |
If Your Child Is Infected
| Action | Duration |
|---|---|
| Isolate | Until blisters dry up (7-10 days) |
| No school/daycare | Until recovered |
| Separate belongings | Own towels, utensils |
| Clean surfaces | Daily in shared spaces |
Tomato Fever vs. Hand, Foot, and Mouth Disease
| Feature | Tomato Fever | HFMD |
|---|---|---|
| Cause | Coxsackievirus A6/A16 | Coxsackievirus |
| Age group | Under 5 | Under 5 |
| Blisters | Larger, tomato-like | Smaller blisters |
| Location | Hands, feet, body | Hands, feet, mouth |
| Treatment | Supportive | Supportive |
| Duration | 7-10 days | 7-10 days |
Many experts believe tomato fever is a variant of HFMD or enteroviral infection.
Frequently Asked Questions
Q: Can tomato fever spread to adults?
A: Yes, but it’s rare. Adults with weakened immune systems may be more susceptible. Most healthy adults don’t develop symptoms even if exposed.
Q: Will my child get tomato fever again?
A: Once recovered, children develop immunity to that specific virus strain. However, there are multiple strains, so reinfection with a different strain is possible (similar to HFMD).
Q: How long is my child contagious?
A: Children are most contagious during the first week of illness. They should be isolated until blisters have dried up, typically 7-10 days. The virus can be shed in stool for weeks after recovery.
Q: Can I send my child to school after fever goes down?
A: Wait until all blisters have dried and crusted over, even if the fever is gone. The blisters can still spread infection. Usually 7-10 days of isolation is needed.
Q: Is there a vaccine for tomato fever?
A: No vaccine currently exists for tomato fever or HFMD. Prevention relies on good hygiene practices.
Key Takeaways
- Self-limiting illness - Usually resolves in 7-10 days
- Highly contagious - Isolate infected child
- Supportive care only - No specific treatment needed
- Hydration is crucial - Offer fluids frequently
- Watch for dehydration - Most important complication to prevent
- Good hygiene prevents spread - Handwashing, surface cleaning
- Keep child comfortable - Manage fever, ease blister discomfort
- See doctor if worried - When in doubt, get evaluated
Sources: Lancet Regional Health – Southeast Asia (2022), genomic confirmation of Coxsackievirus A6/A16; Lancet Respiratory Medicine (2022), “Tomato flu: a misnomer for a common disease”; IAP Guidelines for Fever (paracetamol/ibuprofen dosing and ibuprofen cautions).
This article was reviewed by Babynama Pediatricians. Last updated: February 2026
This article is general information for Indian parents, not a substitute for examination by your pediatrician. In an emergency, call 112 or 108.
Need personalized guidance? Book a consultation with our pediatricians or explore our Care Plans for 24/7 expert support!
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