Atopic dermatitis, also known as eczema, can present in a circular pattern, according to Dr. Cutler. This chronic skin condition usually develops in childhood and can be lifelong or may go away with time. Atopic dermatitis can cause the skin to become extremely itchy, and it also can cause dry patches of skin, rashes that can ooze, weep clear fluid, or bleed when scratched, and thickening and hardening of the skin. The condition may have periods of flares, where symptoms get worse, followed by periods of remission.
Atopic dermatitis may be aggravated by irritants like certain soaps, fabrics, and lotions, stress, and allergens like certain foods, pollen, and animals. The National Institute of Health notes that atopic dermatitis is a common condition that affects people of all ages.
Circular Rashes and Their Causes
Pityriasis rosea is a skin rash that is considered harmless, but it can last for six to eight weeks before it disappears. This rash usually starts with one large patch called a “herald patch” and then is followed by a widespread rash. The rash is usually “more oval-round,” Dr. Wassef says, and it can be mistaken for ringworm, psoriasis, and eczema.
Granuloma annulare causes a rash that’s easily mistaken for ringworm. This rash forms a clear circle with small, firm, reddish bumps, and it can feel slightly itchy. These bumps usually show up on the backs of forearms, hands, or feet. Granuloma annulare is a chronic skin disease and bumps usually return in the same spot.
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Treating Circular Rashes
Circular rashes are caused by a range of different things, including fungi, bacteria, and autoimmune conditions. As a result, the right treatment usually depends on the underlying cause of the rash. If you happen to spot a circular rash but you have no other symptoms, Dr. Wassef recommends moisturizing the area and seeing what happens.
You can also try wearing loose clothing, applying over-the-counter hydrocortisone cream to help with itching, and using a cool compress on the area. If you’re diagnosed with a particular condition, your doctor may prescribe certain medications and treatments to target the illness, like antibiotics for Lyme disease or anti-fungal medications for tinea versicolor.
It’s worth considering that a proper diagnosis is key to effective treatment. By understanding the underlying cause of the rash, doctors can provide targeted treatment and prevent further complications. In some cases, a circular rash can be a symptom of a more serious condition, such as lupus or Lyme disease.
When to See a Doctor
You can try OTC remedies to see if it clears up your rash. But if the rash isn’t improving with over-the-counter medications and creams, see your dermatologist right away. If you’re having symptoms like a fever or aches and pains along with your rash, it’s a good idea to see a physician sooner.
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Any circular rash following a tick bite should be seen immediately, Dr. Malik adds. A prompt diagnosis and treatment can help prevent long-term complications and improve treatment outcomes. In the case of ringworm, for example, early treatment can help prevent the infection from spreading to other parts of the body.
Ringworm creates a circular rash, but Dr. Wassef says it has a unique look. “It’s round with raised borders and is scaly,” she says. “As the ring gets bigger, the central part clears or seems to fade.” Ringworm is not an actual worm or parasite, but rather an infection caused by fungi.
While most people assume ringworm is to blame when a circular rash appears, there are many possible causes. The only way to know what’s behind your rash is to get it checked out by a doctor. They can give a proper diagnosis and recommend next steps from there. By seeking medical attention, you can ensure that you receive the right treatment and prevent further complications.
Dr. Wassef is a doctor.
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