• Baby

• Back pain

• Bacterial vaginosis

• Bad breath

• Baker's cyst

• Balanitis

• Barium enema

• Bartholin's cyst

• Bedbugs

• Bedwetting in children

• Behçet's disease

• Bell's palsy

• Benign brain tumour (non-cancerous)

• Benign prostate enlargement

• Beta blockers

• Bile duct cancer (cholangiocarcinoma)

• Biopsy

• Bird flu

• Birthmarks

• Black eye

• Bladder cancer

• Bladder pain syndrome (interstitial cystitis)

• Bladder stones

• Bleeding from the bottom (rectal bleeding)

• Blepharitis

• Blindness and vision loss

• Blisters

• Bloating

• Blood clots

• Blood groups

• Blood in semen

• Blood in urine

• Blood pressure test

• Blood tests

• Blood transfusion

• Blue or grey skin or lips (cyanosis)

• Blushing

• Body odour (BO)

• Boils

• Bone cancer

• Bone cyst

• Bone density scan (DEXA scan)

• Botulism

• Bowel cancer

• Bowel cancer screening

• Bowel incontinence

• Bowel polyps

• Bowen's disease

• Braces and orthodontics

• Brain abscess

• Brain aneurysm

• Brain death

• Brain tumours

• Breast abscess

• Breast cancer in men

• Breast cancer in women

• Breast lumps

• Breast pain

• Breast reduction on the NHS

• Breast screening (mammogram)

• Breath-holding in babies and children

• Broken ankle

• Broken arm or wrist

• Broken collarbone

• Broken finger or thumb

• Broken hip

• Broken leg

• Broken nose

• Broken or bruised ribs

• Broken toe

• Bronchiectasis

• Bronchiolitis

• Bronchitis

• Bronchodilators

• Brucellosis

• Brugada syndrome

• Bulging eyes (exophthalmos)

• Bullous pemphigoid

• Bunions

• Burns and scalds

• Bursitis