my son who is 24yo has been having problems for almost four months. symptoms include always hungry, nausea , pain in joints of feet and hands, feeling cold, tired and tires eaily. first our gp thought it was an ulcer and put him on omeprazole , no luck so an endoscapy and abdominal ultrasound both were normal with a very mild indication of stomach inflamation, next a battery of blood tests including, hiv , lyme, amylase and lypase, full metabolic panel all normal except for leaning to anemic side and the doc did an iron bllod test and was normal. three types of stool tests im not sure what they were one was for parasites they were normal. last week was an abdominal mri with a process where he drank a solution and scan of his organs. there was no indications of tumors or chrones but they said his colon was constipated he does have a bowl movement once or twice a day but lately they are irregular. he has complained lately of headaches with pain right behind his eyes and this morning he was dizzy and light headed and still feels somewhat lite headed.