¿Por qué me duele el estómago durante dos años a pesar de que el médico no ha encontrado ningún problema?

Your dad has health proble­ms. Alcohol harms people with liver damage­, no gall bladder, and diabetes. Since­ your dad has these issues, drinking alcohol worse­ns things. His liver can get more damage­d. His blood sugar levels rise. Dige­stive system problems may occur. The­ best solution is simple. Your dad should avoid all alcohol complete­ly. This prevents more he­alth damage happening.

The location of the pain in the lower right of your stomach, especially when walking, may be a sign of appendicitis. The swelling of the appendix is called appendicitis. The primary clues may also be loss of appetite, nausea, and fever. A doctor must be sought immediately for a full checkup and proper therapy as appendicitis might be dangerous and can involve surgery as a remedy.

Pancreatitis is inflammation of pancreas. Symptoms include abdominal pain, nausea, vomiting. Causes include alcohol, gallstones, high triglycerides. Treatment involves pain management, fluid replacement .Avoid alcohol, smoking, high-fat diet. Follow up with gastroenterologist .

Typhoid is an infection caused by the bacteria Salmonella. It contains such common symptoms as a high fever, stomach ache, headache, and becoming extremely weak. Your body can combat the bacteria by drinking a lot of fluids and taking antibiotics. Also, get enough rest, as this will help your body heal. 

A bilirubin count of 1.42 corresponds to a mild case of jaundice or icterus, which is due to bilirubin being increased in the blood. I would suggest that you go to a gastroenterologist for a more detailed analysis and treatment. It is important that you get medical treatment early to avoid the complications which may occur with this condition.
 

Irritable bowel syndrome (IBS) can be quite difficult. It brings about pains similar to ulcers and a sore lower back which, can be a nuisance. The source is not yet fully known, but some factors such as stress, diet, or the sensitivity of the gut may be affecting it. However, there is no magic solution, but learning to cope with stress, eating healthy, and some light physical activity can help alleviate the symptoms.