1. Tinea Corporis (Ringworm): A fungal infection that causes round, red, and itchy patches on the skin.
2. Erythema Annulare Centrifugum: A skin condition characterized by red, ring-shaped lesions that enlarge over time and may itch.
3. Granuloma Annulare: A chronic skin condition that causes red or flesh-colored bumps that form in a circular or arc pattern.
4. Pityriasis Rosea: A common skin rash that starts with a single, scaly patch and then spreads into a ring-shaped rash.
5. Nummular Eczema: A type of eczema that causes round, itchy, and scaly patches on the skin.
6. Psoriasis: A chronic inflammatory skin condition that can cause red, scaly patches on the skin.
7. Dermatitis: General term for skin inflammation that can cause redness and irritation.
8. Allergic Reactions: Allergies to certain foods, medications, or substances can cause red, itchy rings on the skin.
It is important to see a doctor to get an accurate diagnosis and proper treatment for red rings on the stomach. The doctor may perform tests such as a skin biopsy or blood tests to determine the underlying cause.