Circular rashes can be symptoms of several medical conditions. Ringworm, which is caused by a fungal infection, is one of the most common causes of this type of rash. Various types of dermatitis can also produce these types of rashes. Some bug bites may result in round rashes. Lyme disease, for instance, is caused by a tick bite, and one of the most common symptoms of this disease is a round rash.
Ringworm is one of the most common causes of a round rash. Contrary to popular belief, ringworm is not caused by any type of worm. It is actually a fungal infection caused by the same fungus responsible for athlete's foot.
The circular rashes associated with ringworm are usually scaly and itchy. Often, there will be a clear area of skin in the center of the rash, creating a ring-shaped rash. Ringworm is typically very contagious, but it is easily treated. An over-the-counter topical anti-fungal cream will usually clear up a ringworm rash. If the rash persists or continues to spread, however, a stronger prescription medication may be needed.
Various types of dermatitis can also cause circular rashes in some people. One of the most common signs of discoid dermatitis, for instance, is a circular, or disc-shaped, rash. This rash most commonly appears on a person's appendages, but it can also develop on other areas of the body as well, including the torso.
Discoid dermatitis, like many other types of dermatitis, also seems to flare up more in dry environments. Treatment of discoid dermatitis typically involves applying a moisturizing cream to any rashes on the body. Topical steroids can also be applied, and these can help keep inflammation down.
Bug bites can also cause circular rashes. The bite sites may also be very itchy, and in some cases, painful, and swollen. Mosquitoes and spiders are two species that commonly cause rashes when they bite a person or animal.
A circular rash is a very common symptom of Lyme disease, which is an infection caused by a bacteria transmitted through deer tick bites. Other symptoms of Lyme disease typically resemble the symptoms of the common flu, and they can include fever, muscle aches, and fatigue. Antibiotics are usually the recommended course of treatment for Lyme disease. To prevent Lyme disease, people who go into wooded areas should wear long pants and shirt sleeves, along with a DEET insect repellent.