2 doctors weighed in:

I have a big lump holding fluids on the shaft of my penis and is starting to get sore and seems to be getting bigger what can this be?

2 doctors weighed in
Dr. James Lin
Urology
1 doctor agrees

In brief: Here are some ...

What you described most likely represents developing an abscess in a sebaceous cyst, which will eventually burst and rupture itself and heal.
But, a complete excision is needed to prevent its recurrence. The best time to do so is while a lump is formed but without superimposed infection; such minor procedure can be done under local anesthesia, If any doubt, ask doc timely.

In brief: Here are some ...

What you described most likely represents developing an abscess in a sebaceous cyst, which will eventually burst and rupture itself and heal.
But, a complete excision is needed to prevent its recurrence. The best time to do so is while a lump is formed but without superimposed infection; such minor procedure can be done under local anesthesia, If any doubt, ask doc timely.
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