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Being no expert on pain, I will share some thoughts on the issue. According to the following site(http://www.helpforpain.com/arch2000dec.htm), there are two types of pain: nociceptive and neuropathic pain. Neuropathic pain involves the central and peripheral nervous system, a possibility I would discount due to no apparent link to suffocation. Thus, it is ...


The redden area around the grayish-white indentation of the canker sore isn't filled with anything. This circular area is simply inflamed. The grayish-white area in the center is not filled with puss or anything else as well. This is an area of dead cells but underneath this layer of dead cells the tissue red [1],[2],[3]. Canker sores, Aphthous stomatitis, ...

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