About 50% of women with IP have minor abnormalities of their hair, usually a loss or lack of hair (alopecia) on the crown of the head. The alopecia is probably caused by scarring from the rash, but this is not proven. As with other children, sparseness of hair as a child does not correlate with the quantity of hair as an adult. Hair color is normal, but the hair strands themselves may be coarse, wiry, and "lusterless". For the most part, individuals do not have substantial problems with their hair.
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.
All photos are an example and not guaranteed to happen.