I hv recently found to have low testosterene level i.e.175 but at the same time have minor acne problems. howz dat poss since acne is due to high lvl?

Nothing's so simple: Serum testosterone varies considerably from day to day and is only one of several factors involved in producing acne even in a young man like yourself. It would be worth knowing why you had your serum testosterone measured in the first place. If you have having erectile dysfunction that's obviously organic, your physician may need to rule out prolactinoma & hemochromatosis.