Discolored Toenails: Causes, Diagnosis, and Treatment Options #3335597 (License: Personal Use)

The image displays a human foot with three visible toes; the hallux (big toe) exhibits a large, opaque blue-gray to black discoloration beneath the nail, consistent with a subungual hematoma or possible longitudinal melanonychia. The second toe shows a smaller, translucent brownish area near the cuticle, possibly early-stage trauma or fungal involvement. Skin texture appears normal, with minimal surrounding erythema or swelling.

Used in dermatology, podiatry, or patient education web pages discussing nail abnormalities; targets users searching for symptoms like “black toenail,” “blue nail under toenail,” or “toenail discoloration after injury.” Helps illustrate differential diagnoses including trauma, fungal infection, or rare malignancy.