An angiokeratoma is a benign lesion of capillaries, resulting in small marks and characterized by hyperkeratosis.
No, it is not normal for this to happen. If it is happening to you then you should seek medical help. Other than a cut there is no way of saying what is causing this without seeing a Doctor or Nurse. It's probably something simple like an angiokeratoma (look it up). They can bleed for ages if knocked. Get it checked out though.
Angiokeratoma of the scrotum: a case of scrotal bleeding .Please have this checked out by a specialist-the above is the worst case scenario,however,in many cases it is simply a case of dry skin,and extra lubrication and moisture creams should be used on the area regularly. By- Syed Amir Ul Haq LLB Hons.