Do not worry, it is Schamberg's disease, also known as pigmented purpuric disease.
It is harmless purpuric disease.. A form of capillaritis in the skin of unknown origin.
It may be due to long time standing position... As in ,you are playing soccer.
The disease is benign.
Mild tret may be considered.. Oral vitamin C
and K may be taken for long time.
Thrombophob oint and mild steroid
cream may be applied.
Elevation of legs may be considered.
You may be benefitted.
I hope you got my answer.
Dr. Ilyas Patel MD