AI-Powered B12 Symptom Checker

Peripheral Neuropathy

Tingling, numbness, or burning sensations in hands and feet. Often starts in extremities and progresses.

Loss of Vibration Sense

Reduced ability to feel vibrations, particularly in feet. Often an early sign of posterior column damage.

Loss of Position Sense (Proprioception)

Difficulty sensing limb position without looking, affecting balance and coordination.

Unsteady Gait / Ataxia

Difficulty walking steadily, increased falls risk, particularly in darkness or with eyes closed.

Memory Problems / Cognitive Impairment

Difficulty concentrating, forgetfulness, word-finding problems, and 'brain fog'.

Reversible Dementia-like Symptoms

Severe cognitive decline mimicking dementia, which may be reversible with B12 treatment if caught early.

Subacute Combined Degeneration of Spinal Cord

Progressive spinal cord damage causing weakness, sensory loss, and gait abnormalities. A medical emergency.

Optic Neuropathy / Visual Disturbances

Visual problems including blurred vision, reduced colour perception, or visual field defects.

Muscle Weakness

Progressive weakness particularly in legs, difficulty climbing stairs or rising from chairs.

Depression

Persistent low mood, loss of interest in activities, feelings of hopelessness, and reduced motivation.

Anxiety

Excessive worry, panic attacks, generalised anxiety, and feelings of dread or impending doom.

Irritability & Mood Swings

Short temper, increased agitation, emotional volatility, and difficulty controlling reactions.

Confusion / Mental Fog

Difficulty processing information, feeling 'spaced out', poor decision-making, and mental cloudiness.

Psychosis

Hallucinations (visual or auditory), delusions, paranoid thoughts, and disordered thinking.

Personality Changes

Altered behaviour patterns, emotional instability, apathy, or uncharacteristic behaviour.

Sleep Disturbances

Insomnia, disrupted sleep patterns, excessive daytime sleepiness, or vivid dreams.

Megaloblastic Anaemia

Large, immature red blood cells (macrocytes) unable to carry oxygen effectively, causing widespread symptoms.

Fatigue and Profound Weakness

Extreme tiredness, lack of energy for daily activities, feeling exhausted despite adequate rest.

Breathlessness

Shortness of breath, particularly on exertion, due to reduced oxygen-carrying capacity.

Palpitations

Awareness of rapid or irregular heartbeat, chest fluttering, heart 'racing'.

Pale or Jaundiced Skin

Pallor (particularly in lips, gums, nail beds) or slight yellow tinge due to red cell breakdown.

Easy Bruising or Bleeding

Unexplained bruises, prolonged bleeding from minor cuts, or petechiae (small red spots).

Glossitis (Sore, Swollen Tongue)

Smooth, beefy-red, swollen tongue with loss of papillae. May cause burning sensation.

Mouth Ulcers

Recurrent painful ulcers or sores in the mouth, particularly on inner cheeks, gums, or tongue.

Loss of Appetite

Reduced desire to eat, early satiety (feeling full quickly), food aversion.

Unintentional Weight Loss

Losing weight without trying, often due to poor appetite and absorption issues.

Nausea and Vomiting

Feeling sick, particularly in the morning or after eating. Occasional vomiting.

Diarrhoea or Constipation

Changes in bowel habits, digestive irregularity, or alternating patterns.

Muscle Cramps and Spasms

Involuntary muscle contractions, particularly in legs and feet, often worse at night.

Joint Pain

Aching joints without obvious swelling, often affecting multiple joints.

Restless Legs Syndrome

Uncomfortable sensations in legs with urge to move, worse at rest and in evening.

Skin Hyperpigmentation

Darkening of skin, particularly in knuckles, nail beds, and oral mucosa.

Hair Loss or Thinning

Diffuse hair loss, premature greying, or changes in hair texture.

Nail Changes

Brittle nails, ridges, or bluish discolouration of nail beds.

Vitiligo

Patches of depigmented (white) skin. Often associated with pernicious anaemia (autoimmune).

Menstrual Irregularities

Heavy, painful, or irregular periods; prolonged menstrual bleeding.

Fertility Difficulties

Difficulty conceiving, recurrent miscarriage, or reduced sperm quality in men.