Do your nails appear yellow, thick, or brittle? Learn how fungal infections develop and the best ways to treat and prevent them.
Onychomycosis is a fungal infection that affects the fingernails or toenails, often causing discoloration, thickening, and nail deformation. The infection occurs when fungi penetrate the nail bed through cracks or cuts. Without treatment, it can spread to other nails or skin and lead to pain or difficulty using hands or feet.
Common Symptoms
Yellow, brown, or white nail discoloration
Thickened or brittle nails
Nails separating from the nail bed (onycholysis)
Crumbly or distorted nail edges
Mild odor or buildup under the nail
When to see a dermatologist
Infection affects several nails or keeps recurring
Pain, swelling, or bleeding develops around the nail
You have diabetes or circulatory problems
Over-the-counter treatments fail to improve symptoms
Nail deformity or discomfort interferes with daily life
Early detection is important for managing the condition and preventing further complications.
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