Pourquoi ai-je des démangeaisons, des douleurs intenses, des évanouissements ?

You are experiencing pain near the navel, are experiencing gases, and regularly urinate at night. They might be symptoms of a urinary tract infection or a prostate condition. Drinking enough water and eating a diet rich in fibers can help with the gas build-up. To effectively handle such symptoms, visit a doctor for diagnosis and treatments.

When you see blood in your stool or have it while having sex, it might be because of hemorrhoids. Hemorrhoids are swollen blood vessels around the anus and lower rectum that can bleed, hurt, or itch. Ejaculation alone doesn't cause them but pushing during bowel movements or any other activity can worsen them. To relieve yourself eat more fibre, drink lots of water, and seek advice from a doctor.

The bacteria might be causing inflammation leading to chest pain, back pain, or discomfort in the upper left part of your tummy. Additionally, pelvic and bellyache could also result from the accumulation of gas which causes bloating as well. To reduce these signs follow the doctor’s prescription on how to deal with H.pylori. In addition, take small meals more frequently; avoid foods that make you gassy, and keep drinking water. 

From what you have described, your son may be having a gastrointestinal infection based on the recurrent gastric pain of fever and vomiting. Your son should have a comprehensive evaluation and treatment by an experienced gastroenterologist. The specialist may recommend further testing like endoscopy or imaging studies to determine the root of the problem. It is advisable to seek medical attention early in order to avoid any complications.

If you have lost immunity to hepatitis B, it means that your body is no longer protected against the hepatitis B virus. Immunity to HBV is typically acquired through vaccination or prior infection.

You might be having a dyspepsia, which is a disorder that often affects the upper part of your digestive system. Symptoms may range from bloating, gas, and nausea to abdominal pain and discontent. I suggest you go to a gastroenterologist to get the right diagnosis and treatment.
 

It's great that you went to the hospital and received treatment for typhoid, malaria, and a cold. Some of these diseases might be responsible for one to feel unwell. Headaches and vomiting can sometimes stick around even after treatment. Ensure drinking lots of water, plenty of rest, and healthy foods. If your symptoms don't get any better, go back to your doctor to get more advice. 

Please share more information about what is bothering you regarding ileostomy, only then i can share proper advice on the matter.