The common clinical causes of red patches on the penis include penile folliculitis, mosquito bites and viral infections.
1. Penile folliculitis: when the skin of the penis is attacked by purulent bacteria, it is easy to cause a local inflammatory reaction, clinical manifestations of the affected area appear red spots, itching, pain and other symptoms.
2. Mosquito bites: mosquitoes carry bacteria, viruses and other pathogenic microorganisms, and the body also contains toxins, when the bite site is infected or injected with toxins, easy to cause local inflammation, redness, swelling and blisters.
3. Viral infection: when the sick people have unclean sex, or share personal items with other people with genital herpes, the body is susceptible to infection by the herpes simplex virus, the clinical manifestation of the genital skin lesions, erythema, papules and blisters.
If you find red patches on the penis, it is recommended to go to the hospital for a clear diagnosis and further treatment.