Nails

The nails of the hands and feet may be involved. That involvement is usually mild and transient but can recur. The nails may be ridged, pitted, thickened, or completely disrupted. If these signs are present, they typically involve most or all the finger-and toenails, not just one or two nails. Benign tumors have been described to grow under the nail bed and correspond with the blistering skin lesions seen in stage II. In extreme cases, these growths can be painful and may be associated with deformities of the finger bones.