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Postherpetic neuralgia (PHN) is neuropathic pain that occurs due to damage to a peripheral nerve caused by the reactivation of the varicella zoster virus (herpes zoster, also known as shingles). PHN is defined as pain in a dermatomal distribution that lasts for at least 90 days after an outbreak of herpes zoster. [ 1 ]
Peripheral neuropathy may be classified according to the number and distribution of nerves affected (mononeuropathy, mononeuritis multiplex, or polyneuropathy), the type of nerve fiber predominantly affected (motor, sensory, autonomic), or the process affecting the nerves; e.g., inflammation (), compression (compression neuropathy), chemotherapy (chemotherapy-induced peripheral neuropathy).
"Wearing shoes that are too tight exacerbate neuropathy symptoms by compressing the nerves in the feet [and can] worsen pre-existing foot deformities, cause blisters, corns or calluses to develop ...
Neuropathy is also a side effect of some chemotherapies, such as in the case of chemotherapy-induced peripheral neuropathy. [13] Chronic paresthesia can sometimes be symptomatic of serious conditions, such as a transient ischemic attack; or autoimmune diseases such as multiple sclerosis, complex regional pain syndrome, or lupus erythematosus.
Shingles, also known as herpes zoster or zona, [6] is a viral disease characterized by a painful skin rash with blisters in a localized area. [2] [7] Typically the rash occurs in a single, wide mark either on the left or right side of the body or face. [1]
The causes of polyneuropathy can be divided into hereditary and acquired and are therefore as follows: [2] Inherited – hereditary motor neuropathies, Charcot–Marie–Tooth disease, and hereditary neuropathy with liability to pressure palsy; Acquired – diabetes mellitus, vascular neuropathy, alcohol use disorder, and vitamin B12 deficiency
Neuritis (/ nj ʊəˈr aɪ t ɪ s /), from the Greek νεῦρον), [1] is inflammation of a nerve [2] or the general inflammation of the peripheral nervous system.Inflammation, and frequently concomitant demyelination, [3] [4] [5] cause impaired transmission of neural signals and leads to aberrant nerve function.
Nerve compression syndrome, or compression neuropathy, or nerve entrapment syndrome, is a medical condition caused by chronic, direct pressure on a peripheral nerve. [1] It is known colloquially as a trapped nerve , though this may also refer to nerve root compression (by a herniated disc , for example).