Paresthesia

paraesthesiatinglingparesthesiaspins and needlesnumbnessnumbness and tinglingparaesthesiaeabnormal sensationsacroparesthesiaparasthesia
"Tingling" and "Pins and needles" redirect here.wikipedia
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Formication

crawling sensations in the skinhallucinate ants crawling all over her bodyparanoid delusions or sensations of insects crawling on the skin
A less well-known and uncommon but important paresthesia is formication, the sensation of bugs crawling underneath the skin.
It is one specific form of a set of sensations known as paresthesias, which also include the more common prickling, tingling sensation known as "pins and needles".

Hyperventilation syndrome

hyperventilation
Other causes include conditions such as hyperventilation syndrome and panic attacks.
HVS may present with chest pain and a tingling sensation in the fingertips and around the mouth (paresthesia) and may accompany a panic attack.

Mercury poisoning

mercurymercury toxicitymercury exposure
It can also be a symptom of mercury poisoning.
They may include muscle weakness, poor coordination, numbness in the hands and feet, skin rashes, anxiety, memory problems, trouble speaking, trouble hearing, or trouble seeing.

Ischemia

ischemicischaemiaischaemic
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 paresthesia.
Clinical manifestations of acute limb ischemia (which can be summarized as the "six P's") include pain, pallor, pulseless, paresthesia, paralysis, and poikilothermia.

Panic attack

panic attacksanxiety attackanxiety attacks
Other causes include conditions such as hyperventilation syndrome and panic attacks.
The most common symptoms include trembling, dyspnea (shortness of breath), heart palpitations, chest pain (or chest tightness), hot flashes, cold flashes, burning sensations (particularly in the facial or neck area), sweating, nausea, dizziness (or slight vertigo), light-headedness, hyperventilation, paresthesias (tingling sensations), sensations of choking or smothering, difficulty moving, and derealization.

Carpal tunnel syndrome

carpal tunnelcarpal tunnel injuryCarpal tunnel syndrome (CTS)
Joint conditions such as rheumatoid arthritis, psoriatic arthritis, and carpal tunnel syndrome are common sources of paresthesia.
The main symptoms are pain, numbness and tingling in the thumb, index finger, middle finger and the thumb side of the ring finger.

Hypothyroidism

hypothyroidhypo-underactive thyroid
Because of this, paresthesia can also be a symptom of vitamin deficiency and malnutrition, as well as metabolic disorders like diabetes, hypothyroidism, and hypoparathyroidism.

Hypoparathyroidism

hypo-Idiopathic hypoparathyroidism
Because of this, paresthesia can also be a symptom of vitamin deficiency and malnutrition, as well as metabolic disorders like diabetes, hypothyroidism, and hypoparathyroidism.
As a result, people with hypoparathyroidism can experience paresthesia, an unpleasant tingling sensation around the mouth and in the hands and feet, as well as muscle cramps and severe spasms known as "tetany" that affect the hands and feet.

Multiple sclerosis

MSmultiple sclerosis (MS)disseminated sclerosis
Chronic paresthesia can sometimes be symptomatic of serious conditions, such as a transient ischemic attack, or autoimmune diseases such as multiple sclerosis or lupus erythematosus.
The specific symptoms are determined by the locations of the lesions within the nervous system, and may include loss of sensitivity or changes in sensation such as tingling, pins and needles or numbness, muscle weakness, blurred vision, very pronounced reflexes, muscle spasms, or difficulty in moving; difficulties with coordination and balance (ataxia); problems with speech or swallowing, visual problems (nystagmus, optic neuritis or double vision), feeling tired, acute or chronic pain, and bladder and bowel difficulties (such as neurogenic bladder), among others.

Diabetes

diabetes mellitusdiabeticdiabetics
Because of this, paresthesia can also be a symptom of vitamin deficiency and malnutrition, as well as metabolic disorders like diabetes, hypothyroidism, and hypoparathyroidism.
The symptoms can include numbness, tingling, pain, and altered pain sensation, which can lead to damage to the skin.

Lyme disease

borreliosisLyme borreliosisLyme
Another cause of paresthesia 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.
Lyme radiculopathy is an inflammation of spinal nerve roots that often causes pain and less often weakness, numbness, or altered sensation in the areas of the body served by nerves connected to the affected roots, e.g. limb(s) or part(s) of trunk.

Whiplash (medicine)

whiplashwhiplash injurywhiplash injuries
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.
Symptoms reported by sufferers include: pain and aching to the neck and back, referred pain to the shoulders, sensory disturbance (such as pins and needles) to the arms and legs, and headaches.

Topiramate

Topamaxtorpiramate
Common side effects include tingling, loss of appetite, feeling tired, abdominal pain, hair loss, and trouble concentrating.

Autonomous sensory meridian response

ASMRAutonomous sensory meridian response (ASMR)ASMR video
A pleasant form of paresthesia, it has been compared with auditory-tactile synesthesia and may overlap with frisson.

Peripheral neuropathy

neuropathyneuropathiesneuropathic
Another cause of paresthesia 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.
As for any neuropathy, the chief symptoms include motor symptoms such as weakness or clumsiness of movement; and sensory symptoms such as unusual or unpleasant sensations such as tingling or burning; reduced ability to feel sensations such as texture or temperature, and impaired balance when standing or walking.

Fabry disease

Fabry's diseaseAnderson-Fabry diseaseGLA
Acroparesthesia is severe pain in the extremities, and may be caused by Fabry disease, a type of sphingolipidosis.
Full body or localized pain to the extremities (known as acroparesthesia) or gastrointestinal (GI) tract is common in patients with Fabry disease.

Fibromyalgia

fibrositisFibromyalgia syndromemuscular rheumatism
Some people also report restless legs syndrome, bowel or bladder problems, numbness and tingling and sensitivity to noise, lights or temperature.

Shingles

herpes zosterzosterDisseminated herpes zoster
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).
Two to four days before the rash occurs there may be tingling or local pain in the area.

Hyperkalemia

high blood potassiumhyperkalaemiahigh blood potassium levels
Occasionally when severe it results in palpitations, muscle pain, muscle weakness, or numbness.

Hydroxy alpha sanshool

It is believed to be responsible for the numbing and tingling sensation caused by eating food cooked with Sichuan peppercorns.

Guillain–Barré syndrome

Guillain-Barré syndromeGuillain-Barre syndromeMiller Fisher syndrome
The first symptoms of Guillain–Barré syndrome are numbness, tingling, and pain, alone or in combination.

Hypocalcaemia

hypocalcemialow blood calciumcalcium deficiency
Otherwise symptoms may include numbness, muscle spasms, seizures, confusion, or cardiac arrest.

Sphingolipidoses

sphingolipidosisdysfunctional metabolism of sphingolipidssphingolipid diseases
Acroparesthesia is severe pain in the extremities, and may be caused by Fabry disease, a type of sphingolipidosis.