Download FND app Android Aapp IoS App
FND Links Feedback Donate Language
  • English
Home / Symptoms / FND Symptoms / Functional Sensory Symptoms

Functional Sensory Symptoms

What are Functional Sensory Symptoms ?

Functional Sensory symptoms describe sensory symptoms anywhere in the body that are due to the nervous system not working properly. They are not caused by damage or disease of the nervous system.
Patients with functional sensory symptoms can experience the following:

  1. A feeling of altered sensation down one side of the body (more commonly the left) – usually involving the face, arm or leg in various combinations. This is sometimes called ‘hemisensory syndrome’. Facial sensory disturbance alone is quite common.
  2. A feeling that a limb just doesn’t belong to them or ‘part of them’.
  3. Fleeting sensations – including twitches, buzzing sensations, electric shock sensations
  4. Sometimes visual symptoms including intermittent blurring and double vision and limb weakness (see ‘Functional Limb Weakness‘ ) may be present on the same side of the sensory symptoms

To the patient and the doctor these symptoms can be alarming. They may make you wonder if you have had a stroke or multiple sclerosis.
However, functional sensory symptoms are not due to damage to the nervous system which means that they can get better or even go away completely.This is because when people have functional sensory symptoms all the parts of the nervous system are there, they are just not working properly so that your brain does not receive the messages in the normal way.

How is the diagnosis made?

The diagnosis of functional sensory symptoms is usually made by a neurologist.

When the doctor listens to your story and examines you they may recognise your symptoms as typical of functional sensory symptoms. On examination the doctor may find that sensation in the affected area is reduced. There may be a mild degree of weakness in association with the sensory disturbance. The pattern of this weakness and response to specialised tests on examination will help the doctor make a positive diagnosis of your condition.

Normal scans and tests help to make the diagnosis, but the diagnosis is usually made by a neurologist when they first meet you.

How do functional sensory symptoms happen?

Functional sensory symptoms arise for different reasons in different people. The reasons are very similar to those that cause functional weakness. These include

  1. After an injury / with pain—People seem particularly vulnerable to functional sensory symptoms after a physical injury or if they have a lot of pain. Studies of patients with chronic pain show that unexpected functional sensory disturbance (usually occurring down one half of the body is quite common). Sometimes functional sensory symptoms occur as part of another condition called Complex Regional Pain Syndrome Type 1 . Click on the link to find out more.
  2. With hyperventilation – In addition, functional sensory symptoms are particularly likely to occur along with symptoms of dizziness and intermittent shortness of breath. Studies in volunteers have shown that if you ask 100 people to breathe quickly for a period of time (hyperventilate), then most will get sensory symptoms. This usually consists of tingling in the fingers or around the mouth. This is believed to be due to the effect on nerve endings of a low carbon dioxide that occurs in hyperventilation. In a small proportion of volunteers however, hyperventilation causes numbness down one side of the body.
  3. An illness with a lot of fatigue or bed rest— sensory symptoms can develop slowly in people who are suffering from a lot of fatigue or exhaustion. In some patients too much rest can bring the symptoms on. There may be an overlap in this situation with Chronic Fatigue Syndrome. Click on the link to find out more.
  4. After an episode of dissociation / panic attack– Functional sensory symptoms like numbness and tingling often occur with other symptoms like lightheadedness and dissociation (a feeling that things around you were distant or disconnected). Dissociation is a bit like a trance and is described elsewhere on this website. Sometimes these episodes are very frightening, especially if they come ‘out of the blue’ and can lead to a panic attack. Once the panic attack is over it can leave behind the feeling that one half of the body is ‘not right’, perhaps heavy or tingly
  5. Migraine – Some people with migraine experience sensory symptoms as part of their attack. Sometimes patients with functional sensory symptoms describe an attack that sounds like migraine after which their sensory symptoms remain persistent. In these cases, the migraine has been the trigger for functional sensory symptoms
  6. No obvious cause – there may be no obvious precipitant, just as some people with migraine have them only when tired or stressed, whereas some have them for no reason at all

weight loss medications meal prep recipes weight loss testosterone dosage for weight loss 80 lb weight loss medication for pcos weight loss weight loss motivation green tea with ginger weight loss neoprene shorts for weight loss foreskin weight loss pills topamax bipolar weight loss biggest loser weight loss pills dr am body diet pills dr oz on diet pills juice cleanse weight loss diet pills blue bottle is shrimp keto diet friendly diet pills watchdog legit lose weight and tone keto diet ulcerative colitis phenphedr ne diet pills lipo burn weight loss pills slim max diet pills laxative pills weight loss genius diet pills review fastin xr diet pills for sale 3x slimming power pills weight loss diet pills with hypothyroidism how much weight can i lose on keto michelob ultra keto diet can you buy diet pills at 17 start a keto diet pills that give you energy and lose weight berries keto diet holistic weight loss

cialis 20 how to make blood flow to your penis no pills best supplements for sex drive male enhancement stamina best online pharmacy without prescriptions liver pills testosterone how old do you have to be to take viagra consumer reviews male enhancement whole foods male enhancement wanna buy penis enlargment pills oh baby pill best male stamina pills raging bull male enhancement pills ht testosterone pills sex enhancement drinks herbal enhancement pills can u buy testosterone over the counter whats testosterone booster fertility blend for men walmart comprar cialis online penis enlargement surgery seattle penis enlarger pills wiki male libido xl pills review when was viagra introduced testosterone pills help your penis grow bottle of penis enlargement pills sex performance enhancement mayo clinic mirena side effects low libido same sex marriage civil rights enhancement is viagra a stimulant testosterone pills 50 mg how get large penis with taking pills or surgery testosterone pills work what is a good vitamin for erectile dysfunction

home glass repair near me window replacement home broken window repair cost window installation rochester mn door window pane replacement window replacement sales how to replacement window replacement window casper window replacement los angeles pittsburgh best replacement windows leer truck cap replacement window anderson windows and doors replacement parts front window glass replacement cost commercial glass replacement large window replacement ideas residential home window repair oswego il 30 x 58 replacement window how to replace window glazing window glass replacement gaithersburg md cost of replacement windows nj replacement window weep holes aluminum replacement windows cost bay window installation jeld wen window replacement parts window air conditioning installation nyc replacement wood casement windows window installation michigan portable ac replacement window bracket velux window flashing installation 24 x 48 replacement windows how to repair window air conditioner state farm window replacement window ac thermostat repair best replacement windows for historical home

plus cbd oil capsules distributing cbd oil georgia what does cbd oil stand for cbd oil natural difference between cannabis and hemp oil flavor cbd oil can you vaporize hemp oil hemp seed oil vs cbd oil 1000mg cbd oil sour kush does colorado cures cbd oil have ethanol in it cbd oil purposes where to buy cbd oil in canton ohio rick simpson cbd oil pills shopify updates expecting cbd oil charges cbd oil effect on mitochondria arete carrboro cbd oil and topicals wisconsin town pulls cbd oil cbd oil is it legal cbd oil effects on aritritis cbd oil dallas hemplebox cbd oil how do you use cbd oil for weight loss cbd oil and xeljanz cbd oil muscle relaxant cbd oil is not illegal wholesale your cbd oil what consistency should pet cbd oil be can hemp cbd oil cause diarrhea plus pro cbd oil 6 mg cbd oil madison wi cbd oil wilson blvd arlingtom v cannabis oil skin cancer treatment cbd oil grams best cbd oil for severe asthma