Parent Questions Β· Infant Β· 4–6 Months

Teething, constipation and other weaning-time problems

New foods bring new complaints: firmer stools, the odd loose day, a drooly baby chewing on everything. Most of it is the body adjusting, and most of it responds to simple changes rather than medicines. This guide covers teething honestly, constipation and diarrhoea after weaning, and how a real food allergy shows itself.

Reviewed by Dr. Bilal Ahmad Sethi, Consultant Paediatrician Β· 7 common questions answered

Close view of a baby's soft skin

Your questions, answered. Tap one to open.

Pick the worry that fits your baby and open it for a clear answer, with what is usually normal, when to see a doctor, and when to go straight to hospital.

Usually normal See a doctor if… Go to hospital now if…
Is drooling, hand-chewing and gum discomfort teething?

It may be teething, which commonly begins around this age, but drooling and mouthing also occur normally. Teething does not explain high fever, severe diarrhoea, marked sleepiness or breathing difficulty.

🟒 Usually normal

Teething discomfort, drooling, variable stool colour or consistency, brief constipation during diet change, occasional simple spit-up and mild eczema flares may occur while the baby remains alert, hydrated and growing.

🟑 See a doctor if

Symptoms persist or worsen; stool is hard with pain, diarrhoea is frequent, vomiting affects feeds, eczema is infected, food causes repeated hives or vomiting, there is poor growth, or the baby refuses both milk and food.

πŸ”΄ Go to hospital now if

There is severe dehydration, blood in stool or vomit, green vomit, swollen abdomen, breathing difficulty, facial swelling, collapse, non-blanching rash, extreme sleepiness or a seizure.

βœ… What you can do: Offer a clean firm teether or cool wet cloth and massage gums with a clean finger. Avoid amber necklaces, numbing gels and honey.

⭐ Zango Clinic’s view: At 4–6 months, comfort teething safely, but do not blame significant illness on teeth.

Why has my baby become constipated after starting food?

Stool may become thicker or less frequent as diet changes. True constipation means hard, painful or pellet-like stool. Too little milk, very thick cereal without variety or low fluid intake after 6 months can contribute.

🟒 Usually normal

Teething discomfort, drooling, variable stool colour or consistency, brief constipation during diet change, occasional simple spit-up and mild eczema flares may occur while the baby remains alert, hydrated and growing.

🟑 See a doctor if

Symptoms persist or worsen; stool is hard with pain, diarrhoea is frequent, vomiting affects feeds, eczema is infected, food causes repeated hives or vomiting, there is poor growth, or the baby refuses both milk and food.

πŸ”΄ Go to hospital now if

There is severe dehydration, blood in stool or vomit, green vomit, swollen abdomen, breathing difficulty, facial swelling, collapse, non-blanching rash, extreme sleepiness or a seizure.

βœ… What you can do: Continue milk, offer suitable fruit and vegetables and small sips of safe water with meals after about 6 months. Do not use soap or rectal stimulation.

⭐ Zango Clinic’s view: At 4–6 months, brief stool change is common, but painful hard stool needs dietary review rather than ghutti.

What should I do if diarrhoea starts after weaning?

Loose stool may follow infection, unsafe water or food, or occasionally a food reaction. Diarrhoea is not a normal requirement of teething or weaning and can dehydrate a young baby quickly.

🟒 Usually normal

Teething discomfort, drooling, variable stool colour or consistency, brief constipation during diet change, occasional simple spit-up and mild eczema flares may occur while the baby remains alert, hydrated and growing.

🟑 See a doctor if

Symptoms persist or worsen; stool is hard with pain, diarrhoea is frequent, vomiting affects feeds, eczema is infected, food causes repeated hives or vomiting, there is poor growth, or the baby refuses both milk and food.

πŸ”΄ Go to hospital now if

There is severe dehydration, blood in stool or vomit, green vomit, swollen abdomen, breathing difficulty, facial swelling, collapse, non-blanching rash, extreme sleepiness or a seizure.

βœ… What you can do: Continue breastfeeding, use ORS as clinically advised, count wet nappies and review food and water hygiene. Seek early assessment for frequent stool or reduced urine.

⭐ Zango Clinic’s view: At 4–6 months, diarrhoea after food introduction is a hygiene or illness signal until assessed, not proof that the stomach is 'adjusting'.

How will I recognise a food allergy?

Possible immediate signs include hives, facial swelling, repeated vomiting, cough, wheeze or collapse. Delayed symptoms can include eczema worsening, vomiting, diarrhoea or blood in stool, but these have other causes too.

🟒 Usually normal

Teething discomfort, drooling, variable stool colour or consistency, brief constipation during diet change, occasional simple spit-up and mild eczema flares may occur while the baby remains alert, hydrated and growing.

🟑 See a doctor if

Symptoms persist or worsen; stool is hard with pain, diarrhoea is frequent, vomiting affects feeds, eczema is infected, food causes repeated hives or vomiting, there is poor growth, or the baby refuses both milk and food.

πŸ”΄ Go to hospital now if

There is severe dehydration, blood in stool or vomit, green vomit, swollen abdomen, breathing difficulty, facial swelling, collapse, non-blanching rash, extreme sleepiness or a seizure.

βœ… What you can do: Introduce one allergenic food at a time in a safe form when the baby is well and observe. Stop the suspected food and seek advice; call emergency help for breathing or circulation symptoms.

⭐ Zango Clinic’s view: At 4–6 months, allergy diagnosis needs a clear history; broad food avoidance without guidance can reduce nutrition.

My baby vomits after solid food. Is this reflux?

A small gag-related vomit may occur during learning. Repeated vomiting after one food, forceful vomiting, green colour, blood, pain, poor growth or dehydration is not simple reflux.

🟒 Usually normal

Teething discomfort, drooling, variable stool colour or consistency, brief constipation during diet change, occasional simple spit-up and mild eczema flares may occur while the baby remains alert, hydrated and growing.

🟑 See a doctor if

Symptoms persist or worsen; stool is hard with pain, diarrhoea is frequent, vomiting affects feeds, eczema is infected, food causes repeated hives or vomiting, there is poor growth, or the baby refuses both milk and food.

πŸ”΄ Go to hospital now if

There is severe dehydration, blood in stool or vomit, green vomit, swollen abdomen, breathing difficulty, facial swelling, collapse, non-blanching rash, extreme sleepiness or a seizure.

βœ… What you can do: Offer smaller amounts, keep upright and record the food and timing. Seek urgent care for green, bloody or repeatedly forceful vomiting.

⭐ Zango Clinic’s view: At 4–6 months, occasional gag-related vomiting can be normal; pattern, colour and the baby's condition decide urgency.

How should I manage eczema while introducing foods?

Use regular fragrance-free moisturiser and prescribed treatment to keep eczema controlled. Eczema can increase food-allergy risk, but removing many foods without diagnosis can harm nutrition.

🟒 Usually normal

Teething discomfort, drooling, variable stool colour or consistency, brief constipation during diet change, occasional simple spit-up and mild eczema flares may occur while the baby remains alert, hydrated and growing.

🟑 See a doctor if

Symptoms persist or worsen; stool is hard with pain, diarrhoea is frequent, vomiting affects feeds, eczema is infected, food causes repeated hives or vomiting, there is poor growth, or the baby refuses both milk and food.

πŸ”΄ Go to hospital now if

There is severe dehydration, blood in stool or vomit, green vomit, swollen abdomen, breathing difficulty, facial swelling, collapse, non-blanching rash, extreme sleepiness or a seizure.

βœ… What you can do: Discuss allergen introduction with the clinician if eczema is severe or egg allergy is known. Introduce safe forms one at a time around 6 months when well.

⭐ Zango Clinic’s view: At 4–6 months, controlled skin and planned allergen introduction are safer than delaying all foods or using steroid mixtures without advice.

Why has stool colour or smell changed after solids?

Food commonly changes stool colour, smell and texture, and small visible food particles can appear. White or chalky stool, black tarry stool unrelated to iron, clear blood or severe watery diarrhoea is not a normal food change.

🟒 Usually normal

Teething discomfort, drooling, variable stool colour or consistency, brief constipation during diet change, occasional simple spit-up and mild eczema flares may occur while the baby remains alert, hydrated and growing.

🟑 See a doctor if

Symptoms persist or worsen; stool is hard with pain, diarrhoea is frequent, vomiting affects feeds, eczema is infected, food causes repeated hives or vomiting, there is poor growth, or the baby refuses both milk and food.

πŸ”΄ Go to hospital now if

There is severe dehydration, blood in stool or vomit, green vomit, swollen abdomen, breathing difficulty, facial swelling, collapse, non-blanching rash, extreme sleepiness or a seizure.

βœ… What you can do: Note new foods and take a photo if needed. Seek prompt review for white, black or bloody stool or an unwell baby.

⭐ Zango Clinic’s view: At 4–6 months, many colourful stools are harmless, but white, tarry black or bloody stool needs medical attention.

When to see Dr. Sethi

These answers help you know what to watch for at home. When something does not feel right, or a red-flag sign appears, a quick consultation is the safest next step. Book a clinic visit or ask on WhatsApp.

More newborn topics

Still worried? Talk to Dr. Sethi.

These answers help you know what to watch for. When something does not feel right, a quick consultation is the safest next step.