Signs & Symptoms
HEAD, NECK, THROAT & SPINE
Scroll down to see some of the signs & symptoms that a vitamin B12 deficiency can cause in the HEAD, NECK, THROAT & SPINE areas of the body.
To see the possible signs & symptoms of other areas of the body just click on the appropriate button on the diagram below.
Symptoms underlined and highlighted in the same colour as their body area can be clicked on to see documented and peer reviewed sources of information.
Because neurological symptoms of vitamin B12 deficiency can cause irreversible damage if left untreated, we have also indicated which of the symptoms are neurological by putting this (N) next to them.

HEAD, NECK, THROAT & SPINE
Neuropsychiatric
Mood & Emotional Changes
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Anxiety (N)
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Apathy (N)
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Depression (N)
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Insomnia/Sleep Disturbances (N)
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Irritability (N)
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Postnatal Depression (N)
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Suicidal Ideation (N)
Psychiatric Changes
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Anorexia (N)
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Behavioral Changes (N)
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Delusion (N)
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Disassociation (N)
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Disorientation/Confusion (N)
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Hallucinations (N)
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Mania (N)
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Paranoia (N)
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Personality Changes (N)
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Psychosis (N)
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Schizophrenic Type Symptoms (N)
Cognitive Changes
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Cognitive Dysfunction/Brain Fog (N)
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Dementia/Alzheimers (N)
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Memory loss/Forgetfulness (N)
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Slurring Speech (N)
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Word/Name Finding Difficulties/Dysphasia (N)
Hair
Textural Changes
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Oily/dry brittle hair
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Limp/lifeless hair
Colour Changes
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Premature greying
Hair Loss
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Thinning
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Alopecia

Musculoskeletal
Spinal Damage
Pain
Neurological
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Nerve Tingling/Pain in Head/Face (N)
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Trigeminal Neuralgia (N)
Headaches
Haematological/Vascular
Cerebrovascular Accident (CVA)
Sensory
Altered Sensation
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Burning/Cold Sensations (N)
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Creepy Crawly Sensations on Skin (N)
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Dizziness/Light Headed (N)
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Vertigo (N)
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Vibrating Sensations (N)
Auditory Changes
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Auditory Hallucination (N)
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Hearing Loss
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Tinnitus (N)
Optical Changes
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Blepharospasm (twitching) (N)
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Dry/Watery Eyes (N)
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Light Sensitivity (N)
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Optic Neuropathy (N)
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Visual Acuity Reduction (N)
Paresthesia
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Tingling Sensation (N)
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Numbness (N)
Chemosensory Changes
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Taste Disturbance (N)
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Smell Disturbance (N)
Movement
Movement Disorders
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Co-ordination Issues (N)
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Dysphagia/Swallowing Difficulties (N)
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Muscular Stiffness/Tightness (with or without pain)
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Musculoskeletal Weakness (with or without pain) (N)
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Myoclonus/Involuntary Movements (N)
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Reflex Abnormalities (N)
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Seizures (N)
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Tremor (N)
Mouth
Oral Changes
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Angular Chelitis (Dry Cracked Corners of Mouth)
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Glossitis/Beefy Red Tongue
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Mouth Ulcers
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Stomatitis