Doctors can often easily recognize
ringworm when there is a distinct ringworm-patterned
rash. Your doctor will probably also look at a hair or skin sample (KOH
preparation) under a microscope to find out whether a fungus is
Tests used for ringworm of the scalp or beard
A fungal culture
(skin culture), which your doctor usually will do only
if diagnosis is difficult or the skin condition is not responding to treatment.
The test results may take 4 to 6 weeks.
If someone in your family has ringworm of the
scalp or beard, talk to your doctor about whether other family members should
be examined. It is quite common for one family member to spread the fungus to
other family members.