MY son is6.5years old sometimes he complains of...

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Regarding your question

What is the treatment for stomach ache in children?

1.Drink plenty of fluids 
2.Eat healthy food and avoid nitrates and spicy food 
3.Flagyl 
4.Buscopan
5.Iboprofen like aspirin
6.Warm baths

What are the causes of stomach ache in children ?

1.Dehydration
2.Food poisoning 
3.Side effects of medications
4.Stomach ulcer
5.Hernia
6.Inflammatory bowel disease
7.Constipation

What are the investigations for stomach pain in children?

1.Clinical assessment at the nearest medical center
2.Abdominal ultrasound 
3.Abdominal CT scan
4.Exploratory surgery

What do we recommend?

Based on your osteogenesis imperfecta medication can cause stomach ache because it is heavy on the stomach but you can check with the pediatrician and with the methods above you can relive the pain drastically 
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