When you get a shot and end up with a big bruise and they say it's because you bruise easy, is this the case?
Some individuals do in fact bruise easily, they may have an ascorbic acid(Vitamin C) deficiency or some coagulopathy. Perhaps they are taking a blood thinner medication like Coumadin, ASA, or Lovenox.
Anytime the tissues are traumatized bruising is possible. Receiving a shot IM or SQ is trauma, albeit very little trauma, nevertheless still trauma. Unfortunately though, a common cause of bruising after receiving an injection is poor technique by the person that administered the shot. Blood slowly leaks into the subcutaneous, dermal and epidermal tissues and causes a bruise.
A bruise is basically a very minor injury that results from leaking blood vessels just under the skin. This blood leaks into the surrounding tissue and forms a bruise.
Many times when people have blood samples taken, they develop what is called a hematoma. A hematoma is when the blood leaks a bit from the vein that the blood was taken from. It forms a lump under the skin and eventually looks like a bruise.
Usually, bruises do not need any treatment but if it is painful ice can be placed on it to help alleviate any pain.