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

The red, itchy skin rash usually starts on the belly or back and face. Then it spreads to almost everywhere else on the body, including the scalp, mouth, arms, legs, and genitals. The rash begins as ...

It commonly appears on the arms, thighs, and cheeks. Skin contact with allergens or irritants can lead to itchy, raised bumps. Common triggers include detergents, metals, or plants like poison ivy.

Some recipients of the Moderna COVID-19 vaccine have reported a red, welted rash that showed up days ... and her injection arm felt itchy a week later, she told Insider. The morning after the ...