<unk>  may result from a variety of causes such as: *Trauma to the region *Inflammation (bug bites, acne) *Varicose veins *Infections *Tumors (malignant or benign) *Diseases of connective tissue *Hypercalcemia *Hyperphosphatemia<unk>  is associated with systemic sclerosis.
Calcinosis cutis
Traumatic calcinosis cutis
Nevus anemicus
Dystrophic calcinosis cutis
Neurocutaneous melanosis
Pseudoxanthoma elasticum
Nevus comedonicus syndrome
Prurigo nodularis