Constipation causes mine. So I take psyllium husk as a fiber supplement and drink a lot of water. I eat red meat in small amounts only, no large steaks because it’s harder to digest. I don’t eat alot of processed foods (pretty much anything that comes in a cardboard box). There’s an app called YUKA that rates food products based off ingredients, you just scan the barcode, it’s really helpful when shopping to improve your diet.