Hi. Thanks for your query and concern about your Father who is not willing to go to a Doctor. Read your question and understood the problem. With the history you have provided, your Father is suffering from : Very sick - 4 weeks - feeling of stomach exploding on sitting down - shaky and weak - No head pain but slight dizziness. I can think of the following problem he may be suffering from: Any general disease like Typhoid, Intestinal infection, inflammatory process in the abdomen like liver abscess, the amoebic one is without fever as also Tuberculosis with its complications. Due to persistent problem of 4 weeks He must been very weak, shaky and dizzy. The feeling of exploding abdomen can be due to the factors mentioned above. There are many serious disorders that can present without fever and other symptoms as the body is weak enough not to respond in a normal way. I would advise you the Following: You have to convince him and family members that he is admitted in a Hospital as then only he can be well examined and investigated and treated. All the relevant blood tests, urine and stool tests. Standing X-ray of the abdomen, Ultrasonography of the abdomen and CT scan only if required. Intravenous antibiotics and fluids and surgical intervention if need be,. Wishing him an early diagnosis and proper treatment and cure.