Patient's question:
Below are two small white spots, sometimes they itch, and they are not completely scaly. It looks a bit like vitiligo, but you can't tell unless you look closely. Is it serious? When I itch, I scratched it badly, and there was some subcutaneous bleeding.Additionally, I had one instance of unsafe sex about 10 months ago, but I haven't had any other symptoms...
Doctor's answer:
Men's groin itching should be cautious of the following six diseases:Allergic Dermatitis: A small number of men may experience allergic reactions in their groin after wearing chemical fiber underwear, using condoms, or applying contraceptive creams, leading to intermittent severe itching and discomfort. If this occurs, immediately discontinue using the relevant products and avoid them in the future. Additionally, camphor ointment or hydrocortisone ointment can be applied externally.
Pubic Lice: Pubic lice infection is a sexually transmitted disease. The lice pierce the skin to feed on blood at the site of infestation, leaving their mouthparts embedded in the skin even after feeding, which causes localized pain and itching. Scratching can lead to skin breakdown and crusting, as well as potential infection. Treatment involves applying a Chinese herbal alcohol extract of stemona (30 grams of stemona soaked in 100 milliliters of 75% alcohol) externally. Generally, one week of medication is sufficient for recovery, and sexual activity should be avoided. Undergarments, bedding, and sheets should be frequently boiled.
Scabies of the Scrotum: Caused by scabies mites, this condition presents as dark red nodules the size of beans on the scrotal skin, with smooth surfaces and clear edges. The area is intensely itchy, and the course of the disease can last for months. Treatment involves alternating the use of 5% sulfur ointment and desonide ointment, applied 2–4 times daily.
Intertrigo: Commonly found in the buttocks and inner thighs but can also affect the penis. It starts as small papules and is intensely itchy, then spreads to form ring-shaped, raised edges with uneven, round or polymorphic skin lesions and scaling. Treatment should avoid overly irritating medications. Generally, topical clotrimazole or nystatin ointment can be used.
Candidal Balanitis: Dry, scaling, or erythematous patches on the penis foreskin...