Hi, Welcome to health care magic, After going through your mother s query,this abdominal pain with dark brown colored vomiting can be irritable bowel syndrome or might appendicitis or uncommonly inflammatory bowel disease like chron s disease or ulcerative colitis but needs to be evaluated further by clinical examination and relevant investigations. Severe cough is related to throat infection and can be managed by appropriate medications. You should undergo routine blood works, stool investigations with ultrasound of abdomen and if all these investigations come normal then upper GI endoscopy would be helpful. Treatment is mainly based on the underlying cause but symptomatic treatment can be taken like antibiotics, anti-inflammatory like ibuprofen and anti-emetics. Give antihistamines for her severe cough It would better to take her to a physician or gastroenterologist for further advise. Thanks and regards,