The reason for your acne
and overgrowth of hair appear to lie in hormonal
imbalance. This leads to growth of facial hair and yes on getting threading there is every possibility of getting secondary infection which can project itself as acne. In such cases amongst herbal medicines we use ashoka along with other blood purifiers as manjishtha etc. Tab. Radona is ideal to prevent eruption of pimples
Proper hygeine, good diet, regular exercise, avoid fried and fatty things.Tab your face with towel dipped in tepid water before going to bed.