My friend is 22. Sometimes after he goes to bed, he wakes up in panic and having rapid heartbeat and with one or both arms numb. Sometimes he gets very dizzy. He once woke up and couldn't get out of bed due to feeling too nauseated. During the day he feels weak, irritable and depressive and has problems concentrating, he describes it as having "emptiness of mind". He has heartburn and hiccups often, as well (not suure if hiccups are any relevant, but ah well). He experiences a frequent need to urinate (3 times in an hour today, for example), even though he doesn't consume a lot of liquids. He has redness and sometimes soreness of his penis tip. I think he often gets hypoglycemia, though eating sweets when he gets so nauseous doesn't really help much.
he isn't on any medication, but he spends a lot of time indoors, at the computer, doesn't really get exercise or a healthy diet or has regular sleep hours...
I would appreciate any help in finding out what these symptoms indicate. Thank you.