As a parent, dealing with baby illnesses can be stressful and daunting. Since infants have developing immune systems, they are more susceptible to infections and health conditions. However, most of these illnesses are common and manageable with the right information and care. Knowing the symptoms, treatments, and when to seek medical help can help parents feel more confident in ensuring their baby’s well-being.

Here is a detailed guide on some of the most common baby illnesses, including tips on how to manage them.
Colds
Symptoms:
- Runny or stuffy nose
- Sneezing
- Coughing
- Mild fever
What to Do:
Colds are caused by viruses and are very common in babies. Keep your baby hydrated, and use a cool mist humidifier to help with congestion. For infants too young to blow their nose, a nasal aspirator can help clear the mucus. Ensure the baby gets plenty of rest.
When to Call the Doctor:
If your baby has difficulty breathing, a high fever, or symptoms that worsen, consult a pediatrician.
Fever
Symptoms:
- Elevated body temperature (over 100.4°F or 38°C)
- Irritability
- Poor feeding
What to Do:
Monitor your baby’s temperature regularly with a digital thermometer. Offer breast milk or formula to keep them hydrated. For fevers above 100.4°F in babies under three months, or fevers lasting more than a couple of days, seek medical advice. Acetaminophen can be given if recommended by a doctor.
When to Call the Doctor:
Fevers in infants under three months always warrant a call to the doctor, as it could indicate a more serious infection.
Ear Infections
Symptoms:
- Tugging or pulling at the ear
- Fussiness, especially when lying down
- Difficulty sleeping
- Fluid draining from the ear
What to Do:
Most ear infections clear up on their own, but a doctor may prescribe antibiotics if it’s bacterial. Over-the-counter pain relievers like acetaminophen can ease the pain.
When to Call the Doctor:
If the baby has a fever, seems in significant pain, or if symptoms persist for more than a few days, consult a pediatrician.
Cough
Symptoms:
- Dry or wet coughing
- Runny nose
- Irritability
- Difficulty feeding or sleeping
What to Do:
Coughs in babies are often linked to colds or viral infections. Keep your baby hydrated and use a humidifier to ease throat irritation. Elevating the baby’s head while sleeping can also reduce coughing. For young babies, avoid over-the-counter cough medicines unless advised by a doctor.
When to Call the Doctor:
If the cough persists for more than a week, is accompanied by a high fever, wheezing, or difficulty breathing, contact a healthcare provider.
Gastroenteritis (Stomach Flu)
Symptoms:
- Vomiting
- Diarrhea
- Fever
- Stomach cramps
What to Do:
Gastroenteritis is usually caused by a viral infection and typically resolves on its own. The most important thing is to keep your baby hydrated, offering small amounts of fluids frequently. Avoid giving solid foods until vomiting subsides.
When to Call the Doctor:
If symptoms last more than 24 hours, there is blood in the stool, or signs of dehydration (dry mouth, no wet diapers for 6-8 hours), seek medical help.
Diaper Rash
Symptoms:
- Red, inflamed skin on the diaper area
- Irritation and discomfort
What to Do:
Keep the diaper area clean and dry by changing diapers frequently. Use barrier creams containing zinc oxide to soothe and protect the skin. Letting your baby have some diaper-free time can also help the skin heal.
When to Call the Doctor:
If the rash doesn’t improve in a few days, or if it worsens (blisters, pus), it could indicate a yeast infection or bacterial issue requiring medical attention.
Constipation
Symptoms:
- Difficulty passing stools
- Hard, dry stools
- Crying or discomfort during bowel movements
What to Do:
Increase your baby’s fluid intake, and if they’re eating solids, offer fiber-rich foods like pureed pears or prunes. A gentle belly massage or bicycle leg movements can help stimulate bowel movement.
When to Call the Doctor:
If constipation persists for more than a few days, or if your baby has very hard, painful stools, consult a pediatrician.
Cradle Cap
Symptoms:
- Scaly, flaky patches on the scalp
- Oily or crusty appearance
What to Do:
Cradle cap is harmless and usually clears up on its own. You can gently wash your baby’s scalp with a mild baby shampoo and use a soft brush to loosen the flakes.
When to Call the Doctor:
If the cradle cap spreads to other areas or doesn’t improve with home care, consult a healthcare provider.
Roseola
Symptoms:
- High fever lasting 3-5 days, followed by a rash
- Red or pink spots that start on the chest and spread
What to Do:
There is no specific treatment for roseola, but the illness is generally mild. Keep your baby comfortable by managing the fever with acetaminophen and keeping them hydrated. The rash itself is not itchy or painful and will fade in a few days.
When to Call the Doctor:
If the fever persists for more than five days or if the baby appears unusually lethargic, contact a doctor.
Respiratory Syncytial Virus (RSV)
Symptoms:
- Cold-like symptoms (cough, runny nose)
- Wheezing
- Difficulty breathing
- Poor feeding
What to Do:
Most cases of RSV can be managed at home with supportive care. Keep your baby hydrated and use a humidifier to ease breathing. RSV can become serious in very young infants, so monitoring breathing is crucial.
When to Call the Doctor:
If your baby has difficulty breathing, rapid breathing, or severe coughing, seek medical care immediately. Babies under six months with RSV may require hospitalization.
Hand, Foot, and Mouth Disease
Symptoms:
- Fever
- Painful sores in the mouth
- Red spots on hands, feet, and diaper area
What to Do:
Ensure your baby stays hydrated, as mouth sores may make drinking uncomfortable. Offer cold liquids and soft foods. Use over-the-counter pain relievers if recommended by a doctor to reduce discomfort.
When to Call the Doctor:
If your baby becomes dehydrated or the symptoms become severe, such as a high fever or inability to eat, consult a pediatrician.
Jaundice
Symptoms:
- Yellowing of the skin and eyes
- Sleepiness
- Difficulty feeding
What to Do:
Jaundice is common in newborns and is caused by elevated bilirubin levels. For mild cases, increased feedings can help the baby’s body eliminate bilirubin. Phototherapy (light therapy) may be required in more severe cases.
When to Call the Doctor:
If jaundice appears within the first 24 hours of life or if it worsens, contact a healthcare provider immediately.
Thrush
Symptoms:
- White patches in the mouth that don’t wipe off
- Fussiness during feedings
- Diaper rash (sometimes associated)
What to Do:
Thrush is a fungal infection common in babies and can be treated with antifungal medications prescribed by a doctor. Ensure you sterilize pacifiers and bottle nipples to prevent reinfection.
When to Call the Doctor:
If the white patches persist or spread, or if your baby seems uncomfortable or refuses to eat, consult a pediatrician.
Teething
Symptoms:
- Drooling
- Irritability
- Chewing on objects
- Swollen gums
What to Do:
Provide your baby with teething toys or a cool, damp washcloth to chew on. Massage their gums gently with your finger. If needed, consult your doctor about giving pain relief like acetaminophen.
When to Call the Doctor:
If your baby develops a fever, rash, or diarrhea while teething, call the doctor, as these symptoms may not be related to teething.
Eczema
Symptoms:
- Dry, red, itchy patches on the skin
- Rough texture
What to Do:
Keep your baby’s skin moisturized with fragrance-free creams or ointments. Avoid harsh soaps and dress your baby in soft, breathable fabrics. A lukewarm bath followed by moisturizer can help soothe the skin.
When to Call the Doctor:
If eczema doesn’t improve with home care or if the skin becomes infected (crusting, oozing), seek medical advice for potential prescription treatments.
Conclusion
While it’s common for babies to experience illnesses as they grow, knowing how to recognize and manage these conditions can give parents peace of mind. Always prioritize hydration, rest, and comfort when your baby is sick, and don’t hesitate to reach out to a healthcare provider when needed. Trust your instincts—if something doesn’t seem right, it’s always best to consult a doctor for reassurance.