What is the most common monsoon illness in children?

There is no single illness that affects every area equally. Viral respiratory infections, diarrhoeal diseases, and mosquito-borne infections commonly increase during rainy seasons depending on local conditions.

How can I tell dengue from a normal viral fever?

Symptoms can overlap considerably. Dengue cannot reliably be diagnosed from symptoms alone, so persistent fever or concerning symptoms should be medically evaluated.

Can children get leptospirosis from rainwater?

Exposure to water contaminated with infected animal urine can transmit leptospirosis, particularly through cuts, damaged skin, or mucous membranes.

When is diarrhoea dangerous in children?

Repeated vomiting, inability to drink, reduced urination, unusual drowsiness, blood in stool, or other signs of dehydration require medical attention.

Should antibiotics be given for monsoon fever?

Not routinely. Many fevers are caused by viruses. Antibiotics should be used when a clinician determines that a bacterial infection requires them.

Home Blogs Monsoon Illnesses Parents Should Watch For

Rainy season health risks and illnesses in children

By Dr K. Krishna Prabhakar

September 09, 2026

Monsoon Illnesses Parents Should Watch For

During the monsoon, children may have increased exposure to mosquito-borne diseases, contaminated food or water, respiratory infections, and skin infections. Important illnesses include dengue, malaria, chikungunya, typhoid fever, gastroenteritis, hepatitis A, leptospirosis, and seasonal respiratory infections. Persistent fever, repeated vomiting, unusual sleepiness, breathing difficulty, reduced urination, bleeding, severe abdominal pain, or signs of dehydration require prompt medical evaluation.

Key Takeaways

Fever during monsoon season should not automatically be assumed to be a simple viral infection.
Dengue can cause high fever, severe body aches, headache, nausea, rash, and sometimes bleeding.
Contaminated food and water can spread diarrhoeal illnesses, typhoid, and hepatitis A.
Walking or playing in contaminated floodwater may increase exposure to leptospirosis.
Children can become dehydrated faster than adults during vomiting and diarrhoea.
Antibiotics should not be given without medical advice.
Mosquito control, safe drinking water, handwashing, and food hygiene can reduce infection risk.
Difficulty breathing, severe dehydration, bleeding, seizures, or reduced responsiveness requires urgent medical care.

Why Do Children Get Sick More Often During the Monsoon?

The rainy season changes the environment in ways that can support the spread of several infections.

Standing water can provide breeding sites for mosquitoes. Floodwater may become contaminated with sewage or animal urine, while improper food storage and contaminated drinking water can increase gastrointestinal infections.

Children may also spend more time indoors, where respiratory viruses can spread between family members and classmates.

Common monsoon health concerns therefore include:

Mosquito-borne infections
Waterborne diseases
Foodborne infections
Respiratory infections
Skin infections
Illnesses associated with contaminated floodwater

1. Dengue

Dengue is a viral infection transmitted mainly through the bite of infected Aedes mosquitoes.

Symptoms can include:

High fever
Headache
Pain behind the eyes
Muscle and joint pain
Nausea
Vomiting
Rash
Marked tiredness

Many children recover with appropriate monitoring and supportive care, but some develop severe dengue.

Dengue Warning Signs Parents Should Know

Seek medical attention promptly for:

Severe abdominal pain
Persistent vomiting
Bleeding from the nose or gums
Blood in vomit or stool
Unusual drowsiness
Restlessness
Breathing difficulty
Marked weakness

Importantly, warning signs can sometimes appear as the fever begins to settle.

Do not assume that a falling temperature always means the child has completely recovered.

2. Malaria

Malaria is caused by parasites transmitted through infected Anopheles mosquitoes.

Symptoms may include:

Fever
Chills
Sweating
Headache
Muscle aches
Nausea
Vomiting
Fatigue

Severe malaria can cause serious complications and requires prompt treatment.

Not every fever during monsoon season is dengue. Depending on symptoms, travel, local disease patterns, and clinical findings, a doctor may recommend testing for malaria or other infections.

3. Chikungunya

Chikungunya is another mosquito-borne viral infection.

Typical symptoms include:

Sudden fever
Significant joint pain
Muscle pain
Headache
Rash
Fatigue

Joint symptoms may be particularly prominent.

Because dengue and chikungunya can produce overlapping symptoms, diagnosis should not be based on symptoms alone.

4. Typhoid Fever

Typhoid fever is caused by Salmonella Typhi bacteria and is generally spread through contaminated food or water.

Symptoms may include:

Persistent fever
Headache
Weakness
Abdominal discomfort
Reduced appetite
Diarrhoea or constipation

Typhoid requires appropriate medical diagnosis and antibiotic treatment.

Parents should avoid giving leftover antibiotics because inappropriate antibiotic use can contribute to antimicrobial resistance and may interfere with diagnosis.

5. Gastroenteritis and Diarrhoeal Illness

Contaminated food and water can spread organisms that cause diarrhoeal disease.

Children may develop:

Loose stools
Vomiting
Abdominal cramps
Fever
Reduced appetite

The major immediate concern is dehydration.

Signs of Dehydration in Children

Watch for:

Dry mouth
Reduced urination
Few or no tears when crying
Sunken eyes
Unusual sleepiness
Irritability
Poor drinking
Marked weakness

Oral rehydration solution can help replace fluids and electrolytes lost through diarrhoea.

Young children and children with persistent vomiting require particularly careful monitoring.

6. Hepatitis A

Hepatitis A is a viral liver infection that can spread through contaminated food or water.

Symptoms may include:

Fever
Fatigue
Loss of appetite
Nausea
Abdominal discomfort
Dark urine
Yellowing of the eyes or skin

Some young children may have mild or few symptoms.

Safe food, clean drinking water, sanitation, and vaccination where appropriate can help prevent hepatitis A.

7. Leptospirosis

Leptospirosis is a bacterial infection that can spread through water or soil contaminated with the urine of infected animals.

Risk may increase after:

Flooding
Walking through contaminated rainwater
Contact with muddy water
Exposure through cuts or broken skin

Symptoms may include:

Fever
Headache
Muscle aches
Vomiting
Red eyes
Abdominal symptoms

Some infections can become severe and affect the kidneys, liver, lungs, or other organs.

Children should avoid playing in potentially contaminated floodwater whenever possible.

8. Respiratory Infections

Rainy weather itself does not directly cause a cold, but respiratory viruses can spread easily when people spend more time together indoors.

Children may develop:

Runny nose
Cough
Sore throat
Fever
Nasal congestion

Most uncomplicated viral infections improve with supportive care.

However, persistent fever, rapid breathing, chest indrawing, wheezing, poor feeding, or significant breathlessness requires medical assessment.

9. Skin and Fungal Infections

Humidity, wet clothing, sweating, and prolonged dampness can irritate the skin.

Children may develop:

Fungal infections
Skin rashes
Irritation between toes
Bacterial infection of cuts
Itching

Keep skin clean and dry and change wet clothing promptly.

Persistent spreading redness, pus, swelling, fever, or painful skin lesions should be medically evaluated.

How Can Parents Protect Children During the Monsoon?

Prevent Mosquito Bites

Remove stagnant water around the home.
Use mosquito screens where possible.
Use age-appropriate mosquito repellents correctly.
Dress children in clothing that reduces exposed skin where practical.

Provide Safe Drinking Water

Use a reliable safe-water source.

Avoid questionable roadside water or ice during periods when water contamination is a concern.

Maintain Food Hygiene

Encourage children to:

Eat freshly prepared food.
Wash hands before eating.
Avoid food that has been stored improperly.
Avoid cut fruit exposed for prolonged periods outdoors.

Keep Cuts Covered

Clean and cover cuts before unavoidable exposure to wet environments.

Change Wet Clothes

Children should change out of soaked clothing and footwear rather than remaining damp for prolonged periods.

What Should Parents Avoid?

Giving antibiotics without medical advice
Assuming every fever is dengue
Ignoring fever because it temporarily improves
Giving unnecessary medicines based only on previous prescriptions
Allowing children to play in contaminated floodwater
Ignoring reduced urine output
Delaying evaluation for persistent vomiting
Sending a sick child to school
Relying only on home remedies when warning signs are present

Consult Paediatrics at Renova Hospitals

Persistent fever, vomiting, diarrhoea, respiratory symptoms, or unusual weakness during monsoon season should not be ignored.

At Renova Hospitals, our Paediatrics and Emergency Medicine teams evaluate childhood infections and provide appropriate testing, hydration, monitoring, and treatment based on the suspected cause.

Request a consultation or call 040 2333 3333.

When Does a Child Need Urgent Care?

Seek urgent medical attention for:

Difficulty breathing
Seizures
Severe dehydration
Persistent vomiting
Significant bleeding
Severe abdominal pain
Very low urine output
Bluish lips
Extreme sleepiness or difficulty waking
Rapidly worsening illness

Medical References

Medically Reviewed & Approved By:

Dr K. Krishna Prabhakar

Internal Medicine, Critical Care, Geriatric Medicine

MBBS – Dr. NTR University of Health Sciences, Andhra Pradesh (2006) MD (Internal Medicine) – Dr. NTR University of Health Sciences, Andhra Pradesh (2010)

This article has been reviewed and approved by a qualified medical professional to ensure accuracy, credibility, and adherence to current clinical standards.

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