Baby acne
Baby blues
bacteremia
Bacterial vaginosis
Baker's cyst
Barrett's esophagus
Bartholin's cyst
Basal cell carcinoma
Bedbugs
Bedsores
Bee stings
Behcet's disease
Bell's palsy
Benign paroxysmal positional vertigo (BPPV)
Bile reflux
Binge eating disorder
Bipolar disorder
Bird flu (avian influenza)
Black, hairy tongue
Bladder cancer
Bladder stones
Blastocystis hominis infection
Blepharitis
Blind loop syndrome
Blocked tear duct
Body dysmorphic disorder
Body lice
Boils
Boils and carbuncles
Bone cancer
Bone metastasis
Bone spurs
Borderline personality disorder
Brachial plexus injury
Bradycardia
Brain aneurysm
Brain AVM (arteriovenous malformation)
Brain tumor
Breast cancer
Breast cysts
Broken ankle or broken foot
Broken arm
Broken collarbone
Broken heart syndrome
Broken leg
Broken nose
Broken ribs
Broken toe
Broken wrist or broken hand
Bronchiolitis
Bronchitis
Brucellosis
Brugada syndrome
Bruxism or teeth grinding
Bubonic plague
Buerger's disease
Bulimia nervosa
Bullous impetigo
Bullous pemphigoid
Bundle branch block
Bunions
Burning mouth syndrome
Burns
Bursitis