I've got white spots like my skin is dry on my penis?

Needs an exam: Some conditions that can cause such problems include Psoriasis, Lichen Planus, Seborrheic Dermatitis, Lichen Simplex, and Lichen Sclerosis. Pre-cancerous lesions can also occur on the privates. A dermatologist can diagnose the problem, although sometimes a biopsy is necessary to determine the cause. There are treatments, once the cause is determined.