I'm a 18 sexually inactive male. 1 day ago in the afternoon, I noticed that my balls are became very itchy, and the skin around it appeared very dry (you can see white flakes on it). It does not hurt, its just super itchy. I don't think if I contracted any STDs or not, but I'm not sexually active, so I don't think it's that. I also didn't change any soap/body wash in the past month, so I don't think it's that either.

Please tell me what I have

P.s. I consumed a lot of alcohol the night before my symptom appeared, I had a mix of jaegermeister and vodka because of drinking games. But I never reacted this way to alcohol. But this is a good info to provide.

Also I've never had this condition before.