Thanks for posting your query.
This skin lesion may be cavernous haemangioma or blood filled blisters.
Do you have any other symptoms apart from these lesions such as joint pains/ itching in body/ eyes discomfort/ mouth ulcers?
You should consult with physician and dermatologist
If cavernous hemangioma
is the basic disease then it can be left as most of the times these are asymptomatic.
If blood filled blisters are the cause, then it may be autoimmune in nature and you have to take immuno-supressants medicines.
Dr. Mayank Bhargava