###Human: I have blisters on my penis after masturbating without a lubricant. What is the treatment? ###Assistant: Hello. There are a few conditions which cause painful blisters even without a sexual contact, like genital herpes, primary syphilis, impetigo among others. Please provide more details: The treatment would vary according to the details you provide. If you underwent any investigations, please attach that during the follow-up. For more information consult a general medicine physician online -->