Where did the pus and blood come from--the scrotum itself, the
penisCancer - penis
Curvature of the penis
Penis care (uncircumcised)
Penis pain, or somewhere else? If the skin of the scrotum, perhaps all you had was folliculitis (a boil).
But if the
swellingAbdomen - swollen
Ankle sprain swelling
Breast - premenstrual tenderness and swelling
Foot swelling
Foot, leg, and ankle swelling
Gums - swollen
Joint swelling
Mastoiditis - redness and swelling behind ear
Scrotal swelling
Swelling feels like it is coming from inside the scrotum--i.e. involves the
testiclesTesticle lump
Testicle pain
Testicle ultrasound etc--then you probably have
epididymitisEpididymitis. Gonorrhea and chlamydia are the main causes, and the timing is about right for having unsafe sex a few weeks ago. However, some cases are due to non-sexually transmitted urinary tract infections and rare cases are due to tuberculosis or other infections. Epididymitis can be quite serious; it can destroy the testicle and if both sides are involved can cause sterility.
Please see a health care provider right away--unless you think it was superficial (a boil) and now is clearing up on its own.
Good luck-- HHH, MD