What should you know about constipation after stomach flu?

Vomiting and diarrhoea remove fluid from the body, while eating less leaves less material for the bowel. Once the illness eases, a temporary change in movement and diet can make stools firmer or less frequent. Dehydration may worsen the problem. If constipation continues after recovery, other explanations such as medicines, an underactive thyroid, irritable bowel syndrome, or a separate bowel condition may need review.

Take frequent small drinks and consider an oral rehydration product if a clinician or pharmacist recommends one. Resume food gradually, choosing soups, fruit, vegetables, oats, beans, and whole grains as tolerated. Gentle walking can stimulate bowel movement. Increase fibre step by step and pair it with fluids. Avoid repeated self-treatment with laxatives if you still have vomiting, significant pain, or a swollen abdomen; ask a pharmacist or clinician first.

Seek urgent help for inability to keep fluids down, faintness, very little urine, severe or worsening abdominal pain, repeated vomiting, a firm swollen abdomen, or inability to pass wind. Contact a clinician if constipation lasts beyond the illness, keeps recurring, or comes with blood or tar-like dark stool. These features may require examination rather than home care alone.

Ask how much fluid is suitable, when to restart fibre, and whether any anti-diarrhoeal, anti-nausea, or pain medicine could be affecting your bowel. Describe the illness, your last bowel movement, urine changes, and any abdominal symptoms.