the pain

the pain for us sometimes is unbearable and for that reason inyesion
gives fear us until putting one to us, but pains exist * chronic Pain:
It is the pain that lasts more than three months, like the oncológico
pain.
   * Acute pain: It is the pain that lasts just a short time,
generally less than two weeks, like a pain teeth, or of a blow.

It is difficult to differentiate an acute pain a chronic pain because
the pain attends sometimes of oscillating form and to periods of time
without pain. The postoperating pain is an acute pain, but sometimes
it extends during several weeks. Migrañas or the dismenorrea happens
during two or three days several times to the year and is difficult to
classify them like acute or chronic pain.

According to the physiology of the pain

   * Nociceptivo pain: He is the produced one by an stimulation of
the nociceptores, that is to say, the receivers of the pain, causing
that the "painful message" is transmitted through the ascending routes
towards the supraspinal centers and is perceived like a painful
sensation. For example pinchazo.

   * Neuropático pain: It is produced by a direct injury on the
nervous system, in such a way that the pain is pronounced before
minimum stimuli or without them and and usually is a continuous pain.

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