Why do I have pain in penis after sex?

Hi,

Welcome to icliniq.com.

I read your query and understand your concerns.

First of all, I like to inform you that your question have a lack of details and this will limit my response to generic one rather than specific applicable to your problem.

The pain in penis after sex is indicative of infection if it occurs up to 24 hours or more. If the pain was immediately after sex most probably it was due to vigorous sex. In there former condition, you need to get blood investigations and urine examinations such as CBC (complete blood count), urine microscopy, urine culture, and sensitivity. If the later condition applies to you, a simple rest for a few days will resolve the condition on most occasions.

Regarding smaller testes, I will suggest semen analysis. This will reveal the amount of sperm produced and thus the measure is testis capacity.

Weakness after sex is non-specific and indicates your poor health. The CBC test advised above will assist us in this. I will request you to eat healthily and do regular exercise.

I hope this helps.