Hello, You have been suffering from stomach problems, you have pain stomach and sometimes blood in stool. You have nausea and vomiting at such times. You should avoid taking oily spicy junk food, food that causes allergy. Avoid taking packaged food, drink boiled water after it cools down. Take well cooked home made food and prefer taking boiled food over spicy food. Prefer to take lean meat over red meat and olive oil over other oils. Drink plenty of water to detox and take adequate rest. You can take food good for the liver and also liver tonics. Blood in the stool can be due to anal fissures, hemorrhoids, polyp, ulcer, colon problem, colorectal cancer and other cancers. You are suggested to get clinically examined by a GP, get all required investigations done. You will be treated accordingly. You also have a lump in the middle of the left buttock, it can be a a boil or a carbuncle. Control your blood glucose level, cut of carbohydrates for better healing. Warn compress will give relief. Use antibacterial soap to keep it clean. Visit ER, you may need to get an incision done to drain the pus. Antiseptic dressing will be done, you will be given a course of oral antibiotics for relief and better healing. Stay away from addictions if any. Take care. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. Nupur K., General & Family Physician