Hematoma is a localized bleeding outside of blood vessels, due to either disease or trauma including injury or surgery and may involve blood continuing to seep from damaged capillaries. It is not to be confused with hemangioma which is an abnormal buildup/growth of blood vessels in the skin or internal organs.

A collection of blood (or even a hemorrhage) may be aggravated by anticoagulant medication (blood thinner). Blood seepage of blood may occur if heparin is given via an intramuscular route.

  • Upper Arm Bruise
  • In this case, people are often concerned about melanoma. If it occurs suddenly within a few days, it is usually not melanoma. If it develops slowly over several months, melanoma should be suspected.
  • Blood donation ― Bruise
  • Unlike melanoma, these lesions are pushed out at a rate of 1 mm per month.
  • Development of intramuscular hematoma
  • Hematoma on the backside
  • Subungual hematoma
  • Bruising
  • Plateletpheresis hematoma