Been itching for a month now right after being treated for trich. Severe itching all over body, no rash or burrows. Related? What could it be

Pruritus. In my practice and most common cause of pruritus is too frequent bathing. You should definitely talk to the dermatologist about this and see if she/he can give you advice on the right to take care of your skin. There may be other causes so they will look.