A fungal nail infection usually isn't painful. But without treatment, over time it can become uncomfortable or even painful to wear shoes, walk, or stand for a long time.
Your symptoms will depend on the type of infection you have. The two most common infections are both caused by dermatophytes.
- Yellow streaks in the nail bed and on the underside of the nail.
- Buildup of bits and pieces of skin and nail fragments (debris) under the nail.
- A discolored and thickened nail that may separate from the skin under the nail.
- A brittle, broken, and thickened nail.
White superficial onychomycosis is a fungal infection of the nail surface. Symptoms include:
- White spots or streaks on the nail surface.
- Soft and powdery nail surface, as the infection gets worse.
- Damaged, crumbly, and brown or gray nail surface. But the nail doesn't separate from the skin underneath.