Cluster headache

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Cluster headache

General Med

General Med

Fever of unknown origin: Clinical

Headaches: Clinical

Cluster headache

Tension headache

Migraine medications

Headaches: Pathology review

Fat-soluble vitamin deficiency and toxicity: Pathology review

Water-soluble vitamin deficiency and toxicity: B1-B7: Pathology review

Zinc deficiency and protein-energy malnutrition: Pathology review

Antihistamines for allergies

Glucocorticoids

Coronary artery disease: Clinical

Coronary artery disease: Pathology review

Heart failure: Clinical

Heart failure: Pathology review

Syncope: Clinical

Hypertension: Clinical

Hypercholesterolemia: Clinical

Peripheral vascular disease: Clinical

Leg ulcers: Clinical

Adrenergic antagonists: Alpha blockers

Adrenergic antagonists: Beta blockers

Adrenergic antagonists: Presynaptic

ACE inhibitors, ARBs and direct renin inhibitors

Thiazide and thiazide-like diuretics

Calcium channel blockers

Lipid-lowering medications: Statins

Lipid-lowering medications: Fibrates

Miscellaneous lipid-lowering medications

Antiplatelet medications

Hypersensitivity skin reactions: Clinical

Eczematous rashes: Clinical

Papulosquamous skin disorders: Clinical

Papulosquamous and inflammatory skin disorders: Pathology review

Alopecia: Clinical

Hypopigmentation skin disorders: Clinical

Benign hyperpigmented skin lesions: Clinical

Skin cancer: Clinical

Diabetes mellitus: Clinical

Diabetes mellitus: Pathology review

Hyperthyroidism: Clinical

Hyperthyroidism: Pathology review

Hypothyroidism and thyroiditis: Clinical

Hypothyroidism: Pathology review

Dizziness and vertigo: Clinical

Hyperthyroidism medications

Hypothyroidism medications

Hypoglycemics: Insulin secretagogues

Miscellaneous hypoglycemics

Gastroesophageal reflux disease (GERD): Clinical

Peptic ulcers and stomach cancer: Clinical

Diarrhea: Clinical

Malabsorption: Clinical

Colorectal cancer

Diverticular disease: Clinical

Diverticular disease: Pathology review

Anal conditions: Clinical

Cirrhosis: Clinical

Cirrhosis: Pathology review

Breast cancer: Clinical

Breast cancer: Pathology review

Laxatives and cathartics

Acid reducing medications

Anemia: Clinical

Anticoagulants: Warfarin

Anticoagulants: Direct factor inhibitors

Anticoagulants: Heparin

Pneumonia: Clinical

Pneumonia: Pathology review

Urinary tract infections: Clinical

Urinary tract infections: Pathology review

Skin and soft tissue infections: Clinical

Protein synthesis inhibitors: Aminoglycosides

Antimetabolites: Sulfonamides and trimethoprim

Miscellaneous cell wall synthesis inhibitors

Protein synthesis inhibitors: Tetracyclines

Cell wall synthesis inhibitors: Penicillins

Miscellaneous protein synthesis inhibitors

Cell wall synthesis inhibitors: Cephalosporins

DNA synthesis inhibitors: Metronidazole

DNA synthesis inhibitors: Fluoroquinolones

Herpesvirus medications

Miscellaneous antifungal medications

Anti-mite and louse medications

Chronic kidney disease: Clinical

Kidney stones: Clinical

Urinary incontinence: Pathology review

PDE5 inhibitors

Stroke: Clinical

Lower back pain: Clinical

Back pain: Pathology review

Asthma: Clinical

Chronic obstructive pulmonary disease (COPD): Clinical

Obstructive lung diseases: Pathology review

Lung cancer: Clinical

Lung cancer and mesothelioma: Pathology review

Allergic rhinitis

Pediatric allergies: Clinical

Bronchodilators: Beta 2-agonists and muscarinic antagonists

Bronchodilators: Leukotriene antagonists and methylxanthines

Pulmonary corticosteroids and mast cell inhibitors

Joint pain: Clinical

Rheumatoid arthritis

Rheumatoid arthritis: Clinical

Rheumatoid arthritis and osteoarthritis: Pathology review

Septic arthritis

Reactive arthritis

Psoriatic arthritis

Anatomy clinical correlates: Heart

Anatomy clinical correlates: Axilla

Anatomy clinical correlates: Breast

Anatomy clinical correlates: Mediastinum

Anatomy clinical correlates: Thoracic wall

Anatomy clinical correlates: Wrist and hand

Anatomy clinical correlates: Vertebral canal

Anatomy clinical correlates: Pleura and lungs

Anatomy clinical correlates: Other abdominal organs

Anatomy clinical correlates: Spinal cord pathways

Anatomy clinical correlates: Male pelvis and perineum

Anatomy clinical correlates: Peritoneum and diaphragm

Anatomy clinical correlates: Female pelvis and perineum

Anatomy clinical correlates: Arm, elbow and forearm

Anatomy clinical correlates: Clavicle and shoulder

Anatomy clinical correlates: Viscera of the gastrointestinal tract

Anatomy clinical correlates: Median, ulnar and radial nerves

Anatomy clinical correlates: Anterior and posterior abdominal wall

Anatomy clinical correlates: Bones, joints and muscles of the back

Acetaminophen (Paracetamol)

Non-steroidal anti-inflammatory drugs

Opioid agonists, mixed agonist-antagonists and partial agonists

Antigout medications

Osteoporosis medications

Bone disorders: Pathology review

Ectopic pregnancy

Complications during pregnancy: Pathology review

Hypertensive disorders of pregnancy: Clinical

Perinatal infections: Clinical

Abnormal uterine bleeding: Clinical

Antepartum hemorrhage: Clinical

Abdominal pain: Clinical

Routine prenatal care: Clinical

Stages of labor

Amenorrhea: Clinical

Amenorrhea: Pathology review

Contraception: Clinical

Virilization: Clinical

Infertility: Clinical

Vulvovaginitis: Clinical

Sexually transmitted infections: Clinical

Abnormal labor: Clinical

Uterine disorders: Pathology review

Irritable bowel syndrome

Cervical cancer: Clinical

Estrogens and antiestrogens

Progestins and antiprogestins

Androgens and antiandrogens

Congenital heart defects: Clinical

Cyanotic congenital heart defects: Pathology review

Acyanotic congenital heart defects: Pathology review

Pediatric ear, nose, and throat conditions: Clinical

Pediatric constipation: Clinical

Pediatric gastrointestinal bleeding: Clinical

Pediatric vomiting: Clinical

Developmental milestones: Clinical

Developmental dysplasia of the hip

Developmental and learning disorders: Pathology review

Puberty and Tanner staging

Precocious and delayed puberty: Clinical

Child abuse: Clinical

Viral exanthems of childhood: Pathology review

Vaccinations: Clinical

Pediatric infectious rashes: Clinical

Pediatric bone and joint infections: Clinical

Pediatric urological conditions: Clinical

Elimination disorders: Clinical

Neurodevelopmental disorders: Clinical

Pediatric ophthalmological conditions: Clinical

Pediatric bone tumors: Clinical

Pediatric orthopedic conditions: Clinical

Pediatric lower airway conditions: Clinical

Pediatric upper airway conditions: Clinical

BRUE, ALTE, and SIDS: Clinical

Pediatric brain tumors

Mood disorders: Clinical

Mood disorders: Pathology review

Anxiety disorders: Clinical

Anxiety disorders, phobias and stress-related disorders: Pathology Review

Eating disorders: Clinical

Eating disorders: Pathology review

Obsessive compulsive disorders: Clinical

Personality disorders: Clinical

Sleep disorders: Clinical

Substance misuse and addiction: Clinical

Drug misuse, intoxication and withdrawal: Alcohol: Pathology review

Drug misuse, intoxication and withdrawal: Hallucinogens: Pathology review

Drug misuse, intoxication and withdrawal: Stimulants: Pathology review

Somatic symptom disorders: Clinical

Sexual dysfunctions: Clinical

Selective serotonin reuptake inhibitors

Serotonin syndrome

Serotonin and norepinephrine reuptake inhibitors

Tricyclic antidepressants

Atypical antidepressants

Monoamine oxidase inhibitors

Atypical antipsychotics

Typical antipsychotics

Anticonvulsants and anxiolytics: Benzodiazepines

Anticonvulsants and anxiolytics: Barbiturates

Seizures: Clinical

Nonbenzodiazepine anticonvulsants

Psychomotor stimulants

Opioid antagonists

Opioid use disorder

Key Takeaways

Cluster headache is a type of headache that is extremely painful and occurs in clusters. They usually affect one side of the head, typically around one eye. Some people experience a "cluster period" of several weeks or months where they get multiple cluster headaches daily, while others only experience a cluster period once every few years.