7 yr old bedwetting

my 7 yr old son had stopped wetting the bed at nights when he turned 4. till 4and half he never wet the bed, but since then he has been wetting the bed every night once sometimes even twice.

He is always in such deep sleep that he just cannot get up and go to the bathroom. Even if i wake him up he walks in a daze with eyes closed and just stands. He doesnt understandanyhting that i tell when i wake him at night.

Please help. He is underweight at 16kgs, a voracious reader, with 450 degrees myopia. He is always in a fantasy world of superheroes. He is very interested in art and reads nature books, music.

He suffers from throat infection often, loves to eat sweet foods, hates spicy food. a very friendly child by nature, prefers to mix wth children who are easy going and older than him. Not at all shy, very curious and adventurous, testing limits. Not a fussy eater, loves fruits, but can eat little food at one time, suffers frm stomach pains constantly.
very honest, kind, worried abt endangered animals, environment.

hv got all necessary tests done. everything is normal.

his father does not involve himself wth the kids (i have an older son 12yrs) at all. their father has been away since 4yrs. I wonder if it is psychological.

PLease tell me if there is a soln in homeo. I feel he will start feeling ashamed of this fact very soon when he gets a little more serious.