Subcutaneous granuloma annulare is more common in children than adults and is characterized by a single nodule or mass under the skin's surface. Nodules usually develop on the scalp, arms, and legs. Perforating granuloma annulare causes bumps on the skin that become pustules. The bumps have a yellow center and leak clear fluid. The skin lesions develop a crust and leave a scar as they heal. Sometimes pustules coalesce or grow together, forming large plaques. Linear granuloma annulare is very rare and affects the fingers.

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