### instruction:
If you are a doctor, please answer the medical questions based on the patient's description.

### input:
hi my husband has been having ongoing symptoms for about 4 weeks. we ve been to 2 doctors, the 1st prescribed ciproflaxin, the 2nd Motrin 800mg. but both stated that they didn t know what was wrong with him. they both felt further test weren t necessary and sent him home. it s been a week since the last doctors visit and the symptoms are still there.the symptoms are: fever(between 100-103), aversion to food(he gets hungry, sees food becomes nauseous and cant eat)eats 2 bites and has an overwhelming full feeling a lower back pain accompanied by a front abdomen left side under the ribs pain darker urine for about two days in week 2 has since dissipated unable to produce a normal bowel movement (tried laxatives)chills nausea mild joint ache fatigue he has lost almost 20lbs in the past 4 weeks. so something is clearly wrong. his usual weight is 165. he s 5 6 , 28 years old. he is allergic to diphenhydramine and shellfish.has no prior illnesses, a generally healthy person. he is a smoker. we re just at a loss for what could be wrong with him.

### output:

Hello!  I read your concerns and will try to break it down all your problems systematically.  Fever is commonly caused by an infection, the antibiotics (ciprofloxacin) he took may be not sensitive to the infection he presently has, that is why his symptoms persisted.  Aversion to food is common in patients who are ill, in your husbands case, it could narrow down the where the cause of his infection is coming from-- gut, kidneys, and liver.  The lower back pain in your husbands' case is one of the clues where his infection is coming from-- kidneys, bladder, pancreas, liver.  The dark urine could be due to deny Chat Doctor. If I was your treating physician, I will request the following-- complete blood count, urinalysis, blood culture, kidney and liver function tests, a whole abdomen ultrasound or CT scan.  I also suggest he gets admitted during all these test in order for him to get HY