Angiokeratoma https://en.wikipedia.org/wiki/Angiokeratoma
Angiokeratoma is a benign cutaneous lesion of capillaries, resulting in small red‑to‑blue macules and characterized by hyperkeratosis. Multiple angiokeratomas on the trunk in young people may indicate Fabry disease, a genetic disorder associated with systemic complications.

Because they are rare, angiokeratomas may be misdiagnosed as melanoma. A biopsy can provide a more accurate diagnosis.

Diagnosis and Treatment
#Dermoscopy
#Skin biopsy
More information ― English
References Cutaneous Angiokeratoma Treated With Surgical Excision and a 595-nm Pulsed Dye Laser 36545640 
NIH
Angiokeratomas are vascular neoplasms with hyperkeratotic red to black papules and plaques, which may present as solitary or multiple lesions with variations in color, shape, and location. Successful treatment not only involves improvement of these symptoms but also cosmetic improvement. This report reviews 2 cases of cutaneous angiokeratoma treated with surgical excision and a 595-nm pulsed dye laser (PDL) in which the patients showed improvement of symptoms and cosmetic appearance. There are various types of angiokeratomas, and their extent, size, condition, and symptoms are different. Therefore, lesion-specific combined treatments may yield better results.
 Angiokeratoma circumscriptum - Case reports 33342183
Angiokeratoma circumscriptum is the rarest form of angiokeratoma, a condition mainly found in females. It shows up as dark-red to blue-black clusters of bumps or nodules on the lower limbs, typically in a pattern that's both segmental and on one side of the body.