<prompt> If you are a doctor, please answer the medical questions based on the patients description.It s been 4 days after my vasectomy and I noticed in the shower that it was firm around the left set of stitches. Almost like scar tissue. I squeezed it like a pimple and puss or semen came out. Is it semen or puss? I ve been reading a bit on possibilities but still concerned. Should I be concerned?  <response>: HelloThanks for query. You have undergone vasectomy 4 days back and has noticed white discharge for the wound. During vasectomy Vas difference a tube that carries sperms is ligated at both the ends it is unlikely to be semen . It is mostly a puss.However, Get it confirmed by microscopic examination and culture of a whitish material that you have noticed. This will help to allay your anxiety and help in taking an appropriate antibiotic to combat infection. Do not worry taking antibiotic and anti-inflammatory Chat Doctor. 