Welcome to HealthcareMagic forum.
You need to do nothing.
What you have is subcutaneous collection of blood due to broken capillaries. This collection will gradually resolve in a few weeks. Try to remove this collection manually can result in infection and worsening of this problem.
You need not visit your doctor for now.
Ice the affected part. Take some anti-inflammatory drug like motrin
to reduce pain and swelling. And watch over it. It should go away in a few days to weeks.
Hope this answer is both helpful and useful.
Wish you a speedy recovery.
Bye for now