While low B12 levels can affect the body in many ways, they usually don’t impact bowel habits like this. It’s great that you’ve had some tests, and they’ve ruled out any inflammation in your stomach or colon. Your symptoms might be due to functional gastrointestinal disorders or hemorrhoids, which are quite common and generally not too serious. Keep an eye on your symptoms, and try not to worry too much. However, if you’re still concerned, getting a second opinion from another doctor might help give you peace of mind.

Your signs like high he­at, loose poop, and low energy could be­ from typhoid fever. Typhoid feve­r is caused by a germ called Salmone­lla typhi that can be found in dirty food or water. The cure­ is antibiotics and drinking lots of wate­r. It is important to see a doctor for the right he­lp and cure. 

Carrying a safety pin in your stomach for 2 long years can result in dangerous situations. You may get a tummy ache, feel like you are going to throw up, or actually, throw up. The pin can cause a tear in the lining of your stomach and be the reason for the infection. It is important to have it done through surgery. If the pin stays there it can cause other problems. A doctor must be seen immediately to get help.

Fissures are little rips in the skin around the anus. Passing hard stools, diarrhea, or inflammatory bowel disease can cause them. To heal the fissure, drink plenty of water, eat foods high in fiber, and use stool softeners. You might need creams or ointments too so that it does not hurt as much and heals faster.

The following is an attempt to explain what could be the reason behind frequently going to the loo with a yellow, foamy stool and the way the body deals with unwanted substances. It is possibly diarrhea caused by the stomach flu or eating something that didn't sit right. To restore electrolytes, drink plenty of water and be properly hydrated. If you experience the loss of appetite, diarrhea, and vomiting that come with the condition, avoid high-fiber foods and processed carbs.

Gallbladder polyps are growths inside the gallbladder which can be described as tiny bumps. These types of polyps generally aren't related to any form of bad breath. Bad breath usually comes from poor dental hygiene or problems with the lungs. Sometimes they may cause pain in your abdomen or make it hard for you to digest food. If they do and are still there when this happens again then taking out your gall bladder might stop anything else like that from happening in the future. 

You have a problem with a condition called irritable bowel syndrome (IBS). The sure signs of IBS are the combination of constipation and diarrhea, in addition to often urgent bowel movements. It may be instigated by stress, some foods, or hormonal changes. For IBS to be controlled, it is important to eat a balanced diet, to drink enough water, to control stress, and to use medications if necessary.

It’s normal to get a tummy ache and not feel like eating when you’re on antimalarial medication. These medicines may sometimes bother your stomach. Remember to continue taking them, but try to ease the discomfort by consuming small and soft meals. Drinking fluids such as water or tea frequently could also be helpful. Should the symptoms persist, consult your doctor for further assistance. 

You mentioned numerous problems that have tortured you in the last 2-3 months - like nausea, fullness after a meal, and heartburn. That can be a sign of anxiety. However, you say that they tend to become aggravated during high-pressure situations such as exams that may lead to that. Anxieties can lead to digestion problems and anticorrelated symptoms. Do some techniques like deep breathing or walking to reduce the stress level. Smaller and more frequent meals can also be of help to avoid your pain.