Urticaria: This is the most common cause of multiple raised circular areas on the skin, often due to allergic reactions, infections, or autoimmune disorders. The lesions are typically itchy, transient, and can appear anywhere on the body.

Eczema/Dermatitis: Characterized by itchy, inflamed skin that can appear as raised circular patches. It can be caused by irritants, allergens, or genetic predisposition.
Psoriasis: An autoimmune condition leading to thick, scaly, raised patches on the skin, often on the elbows, knees, or scalp. The lesions can be circular and may itch or burn.
Tinea Corporis (Ringworm): A fungal infection causing circular, raised, and often itchy lesions on the body. The edges are typically more inflamed than the center.

Malignant Tumors (e.g., Basal Cell Carcinoma, Squamous Cell Carcinoma): Although less common, these can present as raised skin lesions. Early detection is crucial for effective treatment.
Lymphoma (Cutaneous T-Cell Lymphoma): A type of cancer that affects the immune system and can cause skin lesions, including raised patches.
Infectious Diseases (e.g., Leprosy, Tuberculosis): Certain infectious diseases can cause skin lesions that might appear as raised circular areas. These conditions require prompt diagnosis and treatment to prevent serious complications.

Sarcoidosis: A condition where inflammatory cells form lumps known as granulomas in various parts of the body, including the skin, which can appear as raised patches.
Granuloma Annulare: A rare skin condition characterized by small, circular bumps that are often localized to the forearms, hands, or feet.
Necrobiotic Xanthogranuloma: A rare skin disorder that can cause raised, circular lesions, often associated with paraproteinemia (abnormal proteins in the blood).