What would be the cause of a large circular rash on left hip?

A large circular rash on the left hip could have several possible causes. Some of the most common include:

1. Ringworm (Tinea Cruris): Ringworm is a common fungal infection of the skin that can cause a red, scaly, and itchy rash. It often appears in a circular or oval shape and may have a raised border.

2. Psoriasis: Psoriasis is a chronic skin condition that causes red, scaly patches of skin. It can affect any area of the body, including the hips. Psoriatic plaques can be round or oval and may be accompanied by itching and pain.

3. Eczema (Atopic Dermatitis): Eczema is a type of inflammatory skin condition that can cause dry, itchy, and red rashes. It often affects the face, neck, and arms, but can also occur on the hips. Eczema rashes can be circular or irregular in shape.

4. Contact Dermatitis: Contact dermatitis is a rash caused by direct contact with an allergen or irritant. It can cause a red, itchy rash that may appear in a circular or oval shape. Common allergens or irritants that can cause contact dermatitis include poison ivy, detergents, soaps, and cosmetics.

5. Folliculitis: Folliculitis is an infection of the hair follicles. It can cause small, red, and tender bumps on the skin. Folliculitis can occur anywhere on the body, including the hips.

6. Shingles (Herpes Zoster): Shingles is a viral infection that causes a painful rash along the path of a nerve. The rash typically consists of small, fluid-filled blisters that may form in a circular or oval pattern. Shingles can affect any part of the body, including the hips.

7. Lyme Disease: Lyme disease is a bacterial infection transmitted by ticks. In the early stage of Lyme disease, a bullseye rash may appear at the site of the tick bite. The rash typically expands over time and may develop into a large circular lesion.

If you are experiencing a large circular rash on your left hip, it is important to see a doctor for proper diagnosis and treatment. The doctor may perform a physical examination, review your medical history, and order tests to determine the cause of the rash. Depending on the underlying condition, treatment may include topical medications, oral medications, or lifestyle changes.