Does there have to be breakage, fracture, or bleeding in the head for a concussi!

no, a whack on the head would suffice


What causes it?
Concussion is an injury to the brain that usually occurs following a blow or jolt to the head. In most instances, the person doesn't lose consciousness.

Who's affected?
Anyone can suffer a concussion. Common causes include a head injury from a road traffic accident, fall, sports injury or assault.

People who fall often - because of difficulties with walking or balance, for example - and those involved in contact sports are most at risk.

What are the symptoms?
The symptoms of concussion may include:

Headaches, which may be severe and persistent
Dizziness
Nausea
Vision disturbance
Poor balance
Confusion
Memory loss or difficulty remembering things
Poor concentration
Tiredness
Irritability
Anxiety
Low mood


Post-concussion syndrome may occur, with symptoms appearing weeks or months after the initial injury.

Symptoms of post-concussion syndrome include:

Persistent headache
Dizziness
Memory problems
Vision disturbances
Emotional disturbances
Unexplained depression


How can it be prevented?
Avoid situations where a head injury may occur - for example, contact sports - and wear protective headwear to reduce the risk.

For those at risk of falling, the home environment should be made as safe as possible - for example, by having carpets rather than hard flooring.

What's the treatment?
The treatment for concussion is rest. Painkillers are often used to relieve headaches. Admission to hospital for observation is sometimes necessary.


http://www.bbc.co.uk/health/physical_hea…

No there does not have to be bleeding or a fracture for you to have a concussion.Yes it can happen from just a blow to the head.If you sleep there is a possibility of you slipping into a coma,also if you were to vomit you can choke on it.A concussion doesn't always result in you getting knocked out someone can get a concussion and never go unconscious.

http://www.ncbi.nlm.nih.gov/pubmedhealth…