Although antibiotics are often effective and safe, adverse reactions can occur, with rashes being the most common side effect.

Some women develop a rash when using feminine pads or liners. Simple changes and measures usually alleviate the rash.

If you develop an itchy rash after using a hot tub, chances are you may have hot tub folliculitis. The condition occurs when hair follicles are infected with bacteria that live in warm, wet areas. Hot tub folliculitis may be uncomfortable, but it is not usually a serious medical problem.

Certain conditions and trouble with feeding can trigger a rash around the nipples during or after breastfeeding. Although nipple rashes are not typically dangerous, they are uncomfortable and annoying, particularly when you're trying to feed.

Ringworm on the arms is also referred to as tinea corporis. Contrary to the name, worms do not cause the skin condition. This common fungal infection of then skin is highly contagious.

Salicylic acid is a type of beta-hydroxy acid derived from willow bark. A natural exfoliant, the acid is commonly used in topical treatments for aging, sun-damaged skin and acne-prone skin.

Ringworm is a highly contagious fungal infection that develops on the top layer of skin. It has nothing to do with an actual worm; the name comes from the circular lesion that develops at the site of infection. Symptoms of ringworm include itching and redness.

A rash is an area of irritated, swollen and often red skin. Rashes may be itchy, bumpy, scaly, crusted or blistered, as described by the National Institutes of Health. Rashes may appear quickly, or develop over time. Some rashes will resolve on their own while others may require treatment.

Red blotches on your stomach may form when your body releases histamines. Your body releases histamines when you are exposed to allergens. Histamines attach to your cells and cause them to swell and leak fluid. This can cause allergic reactions like red blotches on your stomach.

If you're suffering from an itchy skin rash, you may think it results from something you touched. However, you may want to consider dietary factors instead of a contact allergy. It's possible to manifest food allergy or intolerance symptoms in the form of skin rashes.

Niacin, also known as vitamin B-3 and nicotinic acid, is a water-soluble vitamin. It serves a variety of purposes in the body, including helping to create hormones and improve circulation.

If you are fair skinned and plan to vacation in a more tropical climate than you're used to, you could be at risk for developing heat rash. Heat rash or prickly heat causes the skin to become red, swollen and blotchy and is often itchy and uncomfortable.