Insect bites can do this, and the itching makes me suspect this even moreso. So can bumps you don't notice. See if you can examine near the center of the bruise and find the actual bite. Treat bruises with an ice pack, 10 minutes on, 10 minutes off, for half and hour. Repeat as necessary. While there are a ton of other reasons for this sort of thing, both minor and grave, I'd suggest looking for the easy ones first.
ear enfection
This statement is not true. A bruise is a contusion, which is a fancy word for an injury that causes capillaries to leak blood which causes a bruise. You might be thinking of the word concussion, which is a severe head injury, but without a broken skull. After a head injury or concussion, you should stay awake or have someone check on you every hour and wake you up. The reason is a concussion can cause someone to become unconscious or even die from the brain injury.
Usually a blow to the head [bruise], bleeding in the head, or something enters it.
Bruise (medical term = ecchymosis)
A bruise is a contusion. Bruises or contusions are not really classified, but the cause and injury to other structures are classified, such as "blunt trauma". Most bruising in healthy individuals is not a cause for alarm. The injury to other structures is the concern.Note: Unusual bruising without injury can also be a cause for concern.
It really depends on how you received the injury; however a bruise in the result of an insult to the skin. If the skin becomes abraded during the injury this would cause the scab to form. It is possible to have a bit of a scab from a bruise without noticing an abrasion to the skin and this has to do the the skin being porous and blood collecting near the surface.
It means you hit your knee on something with enough force to break small blood vessels. A bruise is nothing more than blood in the tissues from broken capillaries. A bruise can occur with or without injury to underlying structures.
The simple answer here is no. An area of injury may bruise before, during, or after swelling. Depending on the location of the injury, the mechanism of injury, and the time of injury. If the injury is superficial in location, such as a blunt trauma to the skin overlying the thigh, it is common for bruising to occur in conjunction with the swelling. However, these two injury markers are not always present together. For instance, a knee injury will often cause inflammation and swelling of the joint, without any external evidence of bruising. Generally speaking, bruising is a superficial response to injury.
That's called a bruise - or the medical term is a contusion.
bruise
CONTUSION discoloration, mark, injury, blemish, mar
A black eye, or a bruise.