Pain is an all too common sensation. Though unpleasant, pain is a helpful signal which shouldn't be ignored. It is your body's way of alerting you to immediate injury or asking for "help" with potential or underlying problems you may not be aware of.
We are all familiar with what pain can feel like: burning, stinging, sharp and electric, throbbing, dull or deep aching, but what causes this subjective feeling?
Every tissue in the body has special nerve receptors known as nociceptors. They are specially designed to detect unpleasant or noxious stimuli from mechanical, thermal or chemical sources. When alerted to a stimulus the nerve fires an impulse that mainly travels via the spinal cord to different parts of the brain.
Once
tissue cells are damaged or injured they release 'inflammatory mediators'
such as prostaglandins that stimulate the nociceptors and intensify the
effects of histamine. The effect of this may be an increase of blood supply
to the area, swelling, and pain.
The immediate response most people have is to take something to get rid of the pain. The conventional, pharmaceutical response is to use non steroidal anti-inflammatory drugs (NSAIDs) and pain killers.
Generally, NSAIDs (e.g. Ibuprofen, Diclofenac, Aspirin and Naproxen) work by blocking the body's inflammatory mediators. This then suppresses the sensation of pain and reduces inflammation.
Though they are effective short term, NSAIDs do have harmful side effects when taken inappropriately or long term (one month to years). Side effects include heartburn, indigestion, stomach ulcers and liver damage.
Though the exact mechanism remains unclear, painkillers such as Paracetamol are thought to work by blocking an enzyme in the brain involved in the transmission of pain. It helps bring down high temperatures and doesn't have the same adverse reactions as NSAIDs.
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