welcome to hcm,
I really appreciate your concern,
Bright red coloured stool is due to lower Gastro intestinal tract lesions like Polyp, Haemorrhoids,
Fissure in ano etc.These lesions will be diagnosed with
Colonoscopy. In fissure, there will pain during defecation and bleeding sometimes.
Dark red coloured stool can be due to lesion in upper gut like Stomach or
duodenal Ulcer,gastritis, Cancer etc . Upper GI Endoscopy will confirm the diagnosis.
Alternative
constipation and diarrhoea can be due to
Irritable bowel syndrome. I prescribe Pre and Probiotic capsule to my patients with similar complaints.
Please give high fiber diet, drink plenty of liquids, eat fresh fruits and vegetables. Your 6 yr olds stool should be soft.
Please consult your doctor and get investigated. Please get Upper GI ENDOSCOPY and Colonoscopy.
Please let me know if you have any further questions.
Thanks. regards.