My dad bruises easy and has a problem with haematomas.
A Haematoma is generally defined as a collection of blood outside of blood vessels. Most commonly they are caused by an injury to the wall of a blood vessel, prompting blood to seep out of the blood vessel into the surrounding tissues.
Are they dangerous?
A Subdural or epidural one or one within brain or spinal tissue, can be particularly dangerous.
Blood clots in the urine or stool may indicate the presence of a dangerous abdominal haematoma. Any bruise or other haematoma of the skin that increases in size over time could also present a danger.
They can take weeks or months to heal the skin over the haematoma may turn bluish then brown and yellow as the blood is dissolved and absorbed. Usually, this only takes a couple of weeks but can take months.