A 44-year-old woman complains of generally feeling unwell, chills, a fever of 39°C, and constant burning pain, skin redness, and edema in the area of her left lower leg. The onset of the disease she associates with a scratch on the skin of her left lower leg that she received two days ago. Objectively, in the middle third of the left lower leg, there is a bright area of skin hyperemia with clear borders raised above the unchanged skin. Moderate edema of soft tissues is observed, the soft tissues are painful during palpation. In the center of the hyperemic skin, there is a scab 2x0.2 cm in size that covers a small superficial wound. What complication of microtrauma of the left lower leg is observed in the patient?