Pain is an uncomfortable feeling that tells you something may be wrong. It can be steady, throbbing, stabbing, aching, pinching, or described in many other ways. Sometimes it’s just a nuisance, like a mild headache. The brain response to these pains and tells you if somethings wrong if you get stung you will beable to feel it the brain signals responses to treat it because it hurts.
People often describe it as being a sharp, achy, or throbbing pain. It’s often caused by an external injury. For example, if you hit your elbow, stub your toe, twist your ankle, or fall and scrape up your knee, you may feel nociceptive pain. These are also different ways that you can hurt yourself by accident some go to hospital because the pain is unbearable to handle or its a bad injury.
A pain message is transmitted to the brain by specialized nerve cells known as nociceptors, or pain receptors. When pain receptors are stimulated by temperature, pressure or chemicals, they release neurotransmitters within the cells. Your doctor will also examine you and may order blood tests or X-rays. 
Among the tests that can help pinpoint the cause of your pain are CT scans -Computed tomography scans use X-rays and computers to produce an image of a cross-section of the body. During the test, you lie as still as possible on a table. Skin of the knees, feet, and hands may become purplish, pale, grey, and blotchy or mottled. These changes usually signal that death will occur within days to hours this is discovered as pain in mental health cases as well.
