Other conditions can also cause a ring-shaped rash. One is a skin condition called granuloma annulare, which is a circular bump that usually forms on bony areas such as hands and ankles.

Atopic dermatitis is one of the most common types of eczema. Signs may include inflamed skin, rash, itchiness and excessive dryness. It may also include bumps and swollen skin that may ooze. It ...

The circular marks that are left on the skin after a session should disappear ... people with pre-existing medical conditions ...