Transient<unk> s of the hands, feet, legs, and arms are common, transient symptoms. The briefest, electric shock type of<unk>  can be caused by tweaking the ulnar nerve near the elbow; this phenomenon is colloquially known as bumping one's "funny bone". Similar brief shocks can be experienced when any other nerve is tweaked (a tweaked neck nerve may cause a brief shock-like<unk>  toward the scalp). In the older age group, spinal column irregularities may tweak the spinal cord briefly when the head or back is turned, flexed, or extended into brief uncommon positions (Lhermitte's sign). The most common, everyday cause is temporary restriction of nerve impulses to an area of nerves, commonly caused by leaning or resting on parts of the body such as the legs (often followed by a pins and needles tingling sensation). Other causes include conditions such as hyperventilation syndrome and panic attacks. A cold sore outside the mouth (not a canker sore inside the mouth) can be preceded by tingling because a cold sore is caused by herpes simplex virus. The varicella zoster virus (shingles) also notably may cause recurring pain and tingling in skin or tissue along the distribution path of that nerve (most commonly in the skin, along a dermatome pattern, but sometimes feeling like a headache, chest or abdominal pain, or pelvic pain). Other common examples occur when sustained pressure has been applied over a nerve, inhibiting or stimulating its function. Removing the pressure typically results in gradual relief of these<unk> s. Most pressure-induced<unk>  results from awkward posture, such as engaging in cross-legged sitting for prolonged periods of time. Reactive hyperaemia, which occurs when blood flow is restored after a period of ischemia, such as on rewarming after a cold episode in patients with Raynaud's disease, may be accompanied by<unk> . Chronic Chronic<unk>  (Berger's<unk> , Sinagesia or Bernhardt<unk>  indicates a problem with the functioning of neurons or poor circulation. In older individuals,<unk>  is often the result of poor circulation in the limbs (such as in peripheral vascular disease), most often caused by atherosclerosis, the build up of plaque within artery walls, over decades, with eventual plaque ruptures, internal clots over the ruptures and subsequent clot healing but leaving behind narrowing of the artery openings or closure, both locally and in downstream smaller branches. Without a proper supply of blood and nutrients, nerve cells can no longer adequately send signals to the brain. Because of this,<unk>  can also be a symptom of vitamin deficiency and malnutrition, as well as metabolic disorders like diabetes, hypothyroidism, and hypoparathyroidism. It can also be a symptom of mercury poisoning. Irritation to the nerve can also come from inflammation to the tissue. Joint conditions such as rheumatoid arthritis, psoriatic arthritis, and carpal tunnel syndrome are common sources of<unk> . Nerves below the head may be compressed where chronic neck and spine problems exist and can be caused by, among other things, muscle cramps that may be a result of clinical anxiety or excessive mental stress, bone disease, poor posture, unsafe heavy lifting practices or physical trauma such as whiplash.<unk>  can also be caused simply by putting pressure on a nerve by applying weight (or pressure) to the limb for extended periods of time. Another cause of<unk>  may be direct damage to the nerves themselves, i.e., neuropathy, which itself can stem from injury, such as frostbite, or infection, such as Lyme disease, or may be indicative of a current neurological disorder. Neuropathy is also a side effect of some chemotherapies, such as in chemotherapy-induced peripheral neuropathy. Benzodiazepine withdrawal may also cause<unk>  as the drug removal leaves the GABA receptors stripped bare and possibly malformed. Chronic<unk>  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. The use of fluoroquinolones can also cause<unk> . Stroke survivors and those with traumatic brain injury (TBI) may experience<unk>  from damage to the central nervous system. The varicella zoster virus disease (shingles) can attack nerves causing numbness instead of pain commonly associated with shingles. Acroparesthesia Acroparesthesia is severe pain in the extremities, and may be caused by Fabry disease, a type of sphingolipidosis. It can also be a sign of hypocalcemia. Dentistry Dental<unk>  is loss of sensation caused by maxillary or mandibular anesthetic administration before dental treatment. Potential causes include trauma introduced to the nerve sheath during administration of the injection, hemorrhage about the sheath, type of anesthetic used, or administration of anesthetic potentially contaminated with alcohol or sterilizing solutions. Other Other causes may include: * Autonomous sensory meridian response ("ASMR") * Carpal tunnel syndrome * Cerebral amyloid angiopathy * Chiari malformation * Coeliac disease (celiac disease) * Complex regional pain syndrome * Decompression sickness * Dehydration * Fabry disease * Erythromelalgia * Fibromyalgia * Fluoroquinolone toxicity * Guillain–Barré syndrome (GBS) * Heavy metals * Herpes zoster * Hydroxy alpha sanshool, a component of Sichuan peppers * Hyperglycemia (high blood sugar) * Hyperkalemia * Hyperventilation * Hypoglycemia (low blood sugar) * Hypocalcemia, and in turn: * Hypermagnesemia, a condition in which hypocalcemia itself is typically observed as a secondary symptom * Hypothyroidism * Immunodeficiency, such as chronic inflammatory demyelinating polyneuropathy (CIDP) * Intravenous administering of strong pharmaceutical drugs acting on the central nervous system (CNS), mainly opioids, opiates, narcotics; especially in non-medical use (drug abuse) * Lupus erythematosus * Lyme disease * Magnesium deficiency, often as a result of long term proton-pump inhibitor use * Megavitamin-B6 syndrome * Menopause * Mercury poisoning * Migraines * Multiple sclerosis * Nerve compression syndrome * Obdormition * Oxygen toxicity, especially, breathing oxygen under pressure, such as in scuba diving. * Pyrethrum and pyrethroid (pesticide) * Rabies * Radiation poisoning * Sarcoidosis * Scorpion stings * Spinal disc herniation or injury * Spinal stenosis * Stinging nettles * Syringomyelia * Transverse myelitis * Vitamin B5 deficiency * Variant Creutzfeldt–Jakob disease * Vitamin B12 deficiency * Withdrawal from certain selective serotonin reuptake inhibitors (or serotonin-specific reuptake inhibitors) (SSRIs), such as paroxetine or serotonin-norepinephrine reuptake inhibitors (SNRIs) such as venlafaxine Drugs * Anticonvulsant pharmaceutical drugs, such as topiramate, sultiame, and acetazolamide * Benzodiazepine withdrawal syndrome * Beta alanine * Dextromethorphan (recreational use) * Ketorolac * Lidocaine poisoning * Lomotil * Nitrous oxide, long-term exposure
Paresthesia
Dysuria
Oscillopsia
Ataxia
Carotidynia
Dysosmia
Photophobia
Gastroparesis