Psoriatic arthritis symptoms in the nails: what to know

Psoriatic arthritis may occur with nail pitting, thickening, crumbling, or lifting, alongside joint pain, swelling, or stiffness. Nail changes can affect fingernails or toenails and may be subtle at first.

Psoriasis can affect the nail and the tissue beneath it. You may notice tiny depressions, colour change, ridges, thickened nail material, separation from the nail bed, or crumbling edges. These changes can occur with skin psoriasis or joint inflammation, but fungal infection, trauma, eczema, and other conditions can look similar.

Look at both nails and joints together: ask whether fingers or toes are swollen, whether movement is painful, and whether stiffness is worse after waking or rest. A clinician may inspect the nails and skin closely and decide whether testing is useful.

Keep nails trimmed without cutting the surrounding skin, avoid picking or aggressive manicures, and use gloves for wet or chemical-heavy tasks. Wear roomy shoes if toenails are tender. Photograph changes as they develop and list any recent injury, new product, or skin flare. Do not assume a nail infection or begin treatment without advice, because different causes need different care. Joint symptoms may also lead to discussion of anti-inflammatory medication or physiotherapy.

Arrange an appointment if nail changes persist, spread, or occur with swollen or painful joints. Seek prompt help for pus, increasing redness, severe throbbing pain, fever, or a rapidly worsening nail-fold problem. Urgent care is also appropriate for a hot swollen joint, sudden inability to use a finger or toe, or a painful red eye with vision change.

Do these nail changes look like psoriasis, infection, or injury? Could they relate to my joint symptoms? Should the nail or skin be tested? How can I protect the nail while it grows? Which symptoms would require an earlier review?