Piles can be of various sizes and may be internal (inside the anus) or external ones (outside the anus). Typically, internal piles occur from 2 to 4cm above the opening of the anus. External piles (perianal hematoma) occur on the outside edge of the anus. The internal ones are much more common.3 According to the US National Institutes of Health (NIH), symptomatic hemorrhoids affect at least half the American population at some time in their lives before the age of 50

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A hydrocele is a painless buildup of watery fluid around one or both testicles that causes the scrotum or groin area to swell. This swelling may be unsightly and uncomfortable, but it usually is not painful and generally is not dangerous
Although hydroceles are common in newborns, they can also occur at any age in later life. See a picture of a hydrocele

Good treatments are available for a variety of skin conditions, including rash, itchy skin, skin fungus or infection, skin bumps or skin tags. A dermatologist can advise you on the best way to clean, treat, and protect oily or dry skin.
Mild acne usually causes only whiteheads and blackheads. At times, these may develop into an infection in the skin pore (pimple).

Sexually transmitted diseases (STDs) are caused by infections that are passed from one person to another during sexual contact. These infections often do not cause any symptoms. Medically, infections are only called diseases when they cause symptoms. That is why STDs are also called "sexually transmitted infections..