Chronic itching & irritation. Help.

I've been suffering from itching and irritation in genital area since past 2 and a half months. There is no visible rash or skin inflammation. Itching is less when there is no physical movement or contact (like lying on bed). However, itching usually occurs while sitting or walking on contact with clothes and there is extreme irritation on contact with hair. Sometimes, there is pain like sensation on scrotum skin which feels like due to friction. I've also noticed more than normal movement in scrotum skin which gives a goosebump like sensation and draws attention. The frequency and intensity of itch varies on days but there has not been a single day in past 75 odd days when itching has not occurred. I've contacted dermatologists but the medications haven't really helped. I've applied moisturizers as prescribed by the doctor for dry skin. Now, Topzee M has been prescribed for allergy. I'm not sure what is causing it. Please help.