Ringworm is generally not dangerous and is a common fungal infection of the skin caused by dermatophyte fungi. It typically results in itchy, ring-shaped red rashes and can affect skin, scalp, nails, or feet. While it is uncomfortable and contagious, it is usually treated effectively with antifungal medications. However, if left untreated or if the infection is severe, ringworm can lead to complications such as secondary bacterial infections, severe inflammation, hair loss (especially on the scalp), and nail deformities. People with weakened immune systems may have more difficulty overcoming the infection or may experience more severe forms.

In summary, ringworm itself is not usually serious, but timely treatment is important to avoid complications and spread to others.