A muscle that involuntarily contracts is called a spasm. If the spasm is forceful and sustained, it becomes a cramp. A muscle cramp is thus defined as an involuntarily and forcibly contracted muscle that does not relax. This causes a visible or palpable hardening of the involved muscle. A muscle cramp, technically, occurs when muscle tightens and shortens causing a sudden severe pain. Muscle cramps can last anywhere from a few seconds to a quarter of an hour or occasionally longer. They can recur frequently.

Circumcision is the removal of the foreskin, which is the skin that covers the tip of the penis. Circumcision is considered a very safe procedure for both newborns and older children. Neonatal circumcision is generally a rapid and safe procedure when performed by an experienced physician.

Pain in penis occurs due to varous conditions like trauma, infection, retracted foreskin, urinary tract infections, priapism.

Chronic bacterial prostatitis is also caused by bacteria and is also tr ated with antibiotics. It can be a recurring illness, coming back periodically for years after an initial episode of acute bacterial prostatitis.

Semen analysis is one of the first tests done to determine the cause of infertility in a man. It is also done to determine whether a vasectomy has been successful. This test measures the amount of semen and determines the number and quality of sperm.