Mosquitoes leave itchy bumps on the skin that may swell and become ... Did you wake up with swollen, red welts on your arm?

And the condition most often appears on the upper arms and the backs of the thighs. The bumps may cause the skin to feel dry or rough, and skin affected by keratosis pilaris might also be itchy.

And the condition most often appears on the upper arms and the backs of the thighs. The bumps may cause the skin to feel dry or rough, and skin affected by keratosis pilaris might also be itchy.

Most often, bedbugs leave bites on the arms, legs and back — whatever ... These bites look like raised red bumps. Mosquitoes leave itchy bumps on the skin that may swell and become red.

Alternatively, it may affect only a certain part of the body, such as the face, back, or arm. People with chronic ... dome-shaped, very itchy bumps small bumps that have joined to form raised ...

Sometimes, the penis can become itchy. This may occur alone or with other symptoms, such as inflammation, bumps, or discharge. Possible causes include an infection, psoriasis, and balanitis.