Nail Thickening Psoriasis: What You Should Know

Psoriasis may affect fingernails, toenails or the skin beneath and around them. Affected nails can become thicker, develop small pits, ridges or colour change, and partly lift from the nail bed. Crumbling or tenderness can make footwear, writing or gripping uncomfortable. Nail changes may occur with skin plaques, but they can also appear when skin symptoms are limited. A thick nail is not specific to psoriasis: trauma, pressure, eczema and fungal infection can look similar. A clinician may examine the nail, surrounding skin and other nails, and may test clippings when infection is a possibility.

Keep nails trimmed and file rough edges gently rather than pulling at a lifted nail. Protect hands from repeated wet work and irritating chemicals with suitable gloves, and choose roomy shoes if a toenail is involved. Do not share nail tools, and clean tools after use. Treatment depends on which part of the nail is affected and whether psoriasis is present elsewhere. Options may include medicine applied to the nail or nearby skin, injections in selected cases, or treatment that works throughout the body. A dermatologist can coordinate care for [Psoriasis](/conditions/psoriasis/) and check for a separate infection.

Arrange an assessment if a nail thickens without a clear injury, continues changing, becomes painful, lifts, or interferes with daily activities. Seek prompt care for spreading redness, warmth, swelling, drainage or severe pain, because these can signal infection. A single new dark streak, especially one that widens or reaches the surrounding skin, needs timely examination rather than cosmetic cover-up.

Could this be nail psoriasis, fungus or both? Would a nail sample help? Which nail-care steps should I follow? What treatment fits the nail bed, nail matrix and any skin psoriasis? How will we judge whether the nail is improving?