Heel ecchymosis
Introduction
Introduction to heel freckle Calcanealpetechiae, also known as blackheel, is an asymptomatic cluster of blue-black or black spots that occur on the side or back of the heel. The cause is unclear and occurs mostly in adolescents and ball players. basic knowledge The proportion of illness: the incidence rate is about 20%-40% Susceptible people: no specific population Mode of infection: non-infectious complication:
Cause
Heel ecchymosis
(1) Causes of the disease
The cause of the disease is unclear and is generally thought to be related to local friction or damage.
(two) pathogenesis
The pathogenesis is not very clear, it may be the rupture of the superficial capillary of the dermis, the skin pigmentation changes caused by the excretion of hemoglobin through the epidermis and stratum corneum, and may also be part of the symptoms of thrombocytopenic purpura in adolescents.
Prevention
Heel freckle prevention
Wear comfortable sneakers during exercise to avoid severe friction and trauma. If necessary, you can pause the exercise to reduce recurrence. The disease generally does not require treatment, and the exercise is suspended to make the spots gradually disappear.
Complication
Heel complication Complication
Can be accompanied by sweating.
Symptom
Heel Freckle Symptoms Common Symptoms Heel Blue Black or Black Spotted Freckle
Occasionally occurs in adolescents, especially in ball players, which occur on the back or sides of the heel on one or both sides. Occasionally, the distal toe or toe of the ankle often occurs suddenly, and the damage is cluster blue. Black or black spots, the pressure does not fade, the realm is unclear, can be merged with each other, more without symptoms, can be accompanied by sweating.
Examine
Heel ecchymosis
Histopathology: thickening of the horn layer, cystic dilation of the sweat tube, which can be seen as red blood cells or amorphous yellow-brown circular aggregation; Perls blue staining negative, positive for peroxidase and biphenyl test, indicating that it is derived from hemoglobin, dermal papilla There is extravasation of red blood cells inside.
Diagnosis
Diagnosis of heel freckle
According to the location of the lesion and its clinical and pathological features, it is generally easy to diagnose.
The disease needs to be differentiated from malignant melanoma. The malignant melanoma is initially a papular nodule, gradually enlarged and ulcerated, and the surface is black. Pathological examination shows most malignant melanoma cells with mitotic figures.
