KOH examination

KOH examination is a diagnostic test used by healthcare providers to identify fungal infections on skin, hair, or nails. A small sample of affected tissue or debris is collected and treated with potassium hydroxide (KOH), a chemical that dissolves human cells but leaves fungal cells intact. When examined under a microscope, the fungi become visible, helping determine if a fungal infection is present. This test is quick, straightforward, and commonly used because it provides rapid results, aiding in accurate diagnosis and appropriate treatment.