 [ Symptoms ] if medication for prostate is increased does it take 6mos for affect started taking medicine for inlarge prostate april of 2013 2mg of finasteride doctor increased doses to 5mg of same medication in april of 2014 does it still take 6mos or longer for new doses to take affect [ Disease ] hi this seems to be a result of eczema and dry skin tendancy that ur body has doesnt seem to be a vaginal infection for sure sex causes friction on the affected skin and mucosa causing the superficial layers of skin to get washed off this causes inner layers of skin to get exposed causing itching after having sex try using moisturisers and olive oil thanks