Nail separation

Nails that fall off or separate from the nail bed could also be an indication of PsA. This is known as onycholysis. Onycholysis can occur with or without pitting, but the presence of transverse grooves, or grooves running horizontally across the nail, appears to be strongly associated with PsA.

If you have onycholysis, your nail will begin to peel away from the nail bed. It can also turn yellow, greenish, purple, white, or gray depending on the cause. Onycholysis is usually not painful. It's critical to keep your nails short if you're experiencing separation, but don't clip them too short. As the new nail grows in, simply clip off the affected area. Onycholysis can be treated if the underlying cause is addressed.