Hi, thanks for asking from HCM. I can understand your concern. The stomach/abdominal pain is a visceral pain. It not only causes pain, but also some constitutional symptoms like nausea/vomiting/headcahe/sweating/visual blurring/palpitation. These all symptoms occur due to Parasympathetic system . In case of your husband, he might be having campy pain abdomen along with headache and blurring. He is getting annoyed by light, thats why he wants light to be shut down. You need to consult doctor for evaluation of cause and management. At home, you can : Ask him to take rest. : Avoid spicy/fatty/heavy meal : If cramps, avoid salad : You can give him Pantoprazole-Domperidone after proper prescription. : For pain, you can give her Tab Drotaverine after prescription Hope it will help him. Thanks, take care.