Intertrigo is a common inflammatory skin condition that is caused by skin-to-skin friction (rubbing) that is intensified by heat and moisture. It usually looks like a reddish rash. Trapped moisture, which is usually due to sweating, causes the surfaces of your skin to stick together in your skin folds.

Brachioradial pruritus is a neurological condition that causes itchiness and other abnormal sensations in your forearms. A combination of cervical radiculopathy and ultraviolet radiation exposure causes it. There’s a variety of treatment options, including avoiding sun exposure and oral and topical medications.

A circular rash is commonly caused by a fungal infection called ringworm. However, other common skin infections, an allergic reaction, and chronic skin disorders can also cause a circular rash. The treatment for a circular rash depends on what is causing it but can include medications taken by mouth or put on the skin.

Intertrigo is a rash that usually affects the folds of the skin, where the skin rubs together or where it is often moist. This rubbing can cause a breakdown in the top layers of the skin, causing inflammation and a rash. The breakdown of skin makes it easier for bacteria or fungus to develop in this area. It can make the rash worse.