However, medical attention should be sought promptly if the child develops:

Fever

Rapidly spreading redness

Severe pain

Significant swelling

Pus or drainage

Blistering

Open sores

Red streaks spreading from the affected area

Facial or eye involvement

Signs of a serious allergic reaction

A rash accompanied by difficulty breathing, swelling of the lips or tongue, or severe illness requires emergency medical attention.

The Bottom Line

The circular marks in this photograph could have several possible explanations, and it isn't possible to diagnose the condition reliably from the image alone.

One important possibility is ringworm (tinea corporis), particularly if the patches are expanding, itchy, or scaly around the edges. Other possibilities include granuloma annulare, eczema, contact dermatitis, and other inflammatory skin conditions.

Because the marks have reportedly been present for two months and are getting worse, this isn't something a parent should simply continue watching indefinitely.

A healthcare professional can examine the lesions and, if necessary, perform a simple test to determine whether fungus is involved.

Most importantly, don't panic and don't assume the worst.

A persistent childhood rash deserves attention, but many of the conditions that cause circular skin lesions are treatable once the correct cause has been identified.

If your child has a rash that keeps growing, changing, or returning, getting the right diagnosis is far more useful than trying random creams at home.