What causes red spots at the base of penis shaft?
Patient: Less than 2 days after having unprotected sex without climax (still poor judgement), I noticed some red spots at base of shaft.  Didn't notice anything else but maybe didn't examine better.  Later that night I masturbated, and afterwards noticed some random red dots on the head of my penis, still wonder if they were there before masturbating, I didn't notice them.  Very small, don't seem clustered.  Not Raised, no itching, nothing noticeable at all.  I just can see them. Doctor: Hello and Welcome to ‘Ask A Doctor’ service. I have reviewed your query and here is my advice.  Red spots on the penis may be seen in pressure induced allergy patients. After vigorous masturbation it lead to release of histamine locally lead to induration. Nothing to worry, apply less pressure. Use antihistamine before masturbation. If symptoms not improved please consult your doctor he will examine and treat you accordingly.  Hope I have answered your query. Let me know if I can assist you further. Regards, Dr. Penchila Prasad Kandikattu