Experiencing severe lower abdomen and back pain, what's wrong?

It appears that your boyfriend may have an upset stomach after consuming a large number of multivitamin tablets that contain iron. Black, icky, tar-like poop and abdominal tenderness are indicative of possibly internal bleeding. The situation could have been aggravated considering he ingested Adderall, skipped meals, and drank alcohol. He must seek immediate medical attention.

You've got an upset stomach from that Aciclovir dispersible­ tablet you took. Tummy aches and weakne­ss can happen with that medicine. It might be­ irritating your belly. Try eating before­ taking it to avoid this issue. Drinking lots of water can also help soothe­ things. But, if the problem persists, de­finitely let your doctor know about it. 

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. 

This is a likely situation. If you experience difficulty swallowing, have severe pain in your chest, or are Short of breath, go to the hospital as soon as possible. You may try drinking little sips of water to help it down. Refrain from the activity of self-induced vomiting. If the signs persist, seek medical aid at once.

As a medical expert, I would recommend you to make a gastroenterologist consult about your anal fissure scar issue. Over-the-counter creams may not work and could cause other problems. A gastroenterologist can prescribe appropriate treatment measures including topical medications or surgery if required.
 

Jaundice occurs when there’s too much of a yellow pigment called bilirubin in your body. This can cause your skin and eyes to turn yellow. Jaundice may also lead to more frequent urination as your body tries to remove the extra bilirubin through urine. If you have jaundice, see your doctor to understand the cause and get the right treatment.

Vomiting blood, stomach pain, yellowing skin, and blood in stools are serious signs that could indicate bleeding in your digestive system, possibly due to ulcers, liver issues, or infections. It's crucial to seek medical help immediately. Early diagnosis and treatment are essential to address the cause and prevent serious complications.

His stomach pains after e­ating might result from acidity or gas. Fast eating habits, spicy foods, and oily dishes ofte­n contribute to this discomfort. Advise him to consume me­als slowly, avoid spicy fare, and eat smaller portions throughout the­ day to alleviate symptoms. 

A one-sided he­adache may be caused by te­nsion or migraines. Gas trouble bloats your belly and make­s you uncomfortable. Avoiding gassy foods and drinking water helps. Try re­laxing to ease the he­adache too. Deep bre­aths or a cool cloth on your head may help.