If you are suffering from a very painful pimple with a diameter of 5 mm or more, you probably have nodulocystic acne, also known as cystic acne. This type of acne forms deep within the skin and is one of the most severe forms of acne vulgaris.

Up to 45 million Americans have acne, making it the most prevalent skin condition in the U.S., according to the University of Maryland Medical Center. Symptoms can include whiteheads, blackheads, pink bumps, pimples and large, inflamed and pus-filled lesions known as cysts and nodules, which might lead to scarring.

The drug Accutane, or isotretinoin, treats severe cases of acne, especially cystic or nodular acne that create painful lesions on and under the skin. Other brands of isotretinoin are available by prescription such as Claravis, Amnesteem and Sotret.

When you develop an acne breakout, instead of reaching for prescription medications or harsh skin cleansers, grab a glass of water. Drinking enough water every day helps contribute to clear, more beautiful skin because of how your body responds to the flushing of toxins in your system.

Some acne sufferers have more than just acne to contend with -- they also have to deal with residual brown or purple spots that remain after blemishes clear. These ugly marks are not scars, though they can take up to a year to disappear, according to TeensHealth.

Pimples can form when sebum gets blocked in pores by dead skin cells in hair follicles. Bacteria grows inside the follicles, which then rupture near the surface and form whiteheads or blackheads.

Cystic acne on the back causes hard, deeply embedded nodules. They are often painful and may last for weeks or even months. Cystic acne frequently leaves behind scars and can be extremely difficult to treat.

Pimples under the breasts, typically caused by sweating, friction or tight clothing, can be bothersome and even embarrassing. The skin on your breasts is thicker than on your face, which makes these blemishes somewhat more difficult to treat. Waiting for the pimples to go away is one option.

While acne is never welcome, pimples inside the nose can be particularly uncomfortable. Acne inside of the nose may sensitive upon contact, and extended contact may prevent the sores from healing.

Acne is a skin condition that causes red pimples. Pimples can occur in a variety of locations, including the face, back, neck and chest area. Acne is caused by many factors, such as bacteria on the skin, overactive oil glands and hormones.

Even when you manage to rid your face of acne, bumps and breakouts along the hairline can still persist. Not only is this frustrating, but it can make you hesitant to try out new hairstyles and looks in fear of aggravating or even revealing your blemishes.

Cystic acne can be painful, irritating and embarrassing. If you suffer from cystic acne outbreaks, you can see a dermatologist to discuss prescription drugs that may help your condition.