Differential diagnosis
Common
Infrequent
- Influenza
- Fibromyalgia
- Infectious mononucleosis
- Erythema infectiosum
- eclampsia" class="int-link topic-link" >Pre-eclampsia
- Temporal arteritis
- Campylobacter infection
- Scarlet fever
- Stroke
- Cocaine
- Viral meningitis
- Brain tumours
- Bacterial meningitis
- Chronic fatigue syndrome
- Peritonsillar abscess (quinsy)
- Herpes simplex encephalitis
- Carbon monoxide poisoning
- Subdural haemorrhage
- Henoch-Schonlein purpura
Rare
- Idiopathic intracranial hypertension
- Pituitary apoplexy
- Prolactinoma
- Extradural haematoma
- Superior vena cava obstruction
- Central venous thrombosis
- Eclampsia
- Vestibular schwannoma
- Brain abscess
- Malaria (Falciparum)
- Phaeochromocytoma
- Dengue fever
- Carotid artery dissection
- Polycythaemia vera
- Acromegaly
- Behcet's syndrome
- Psittacosis
- Legionella pneumonia
- Acute lymphoblastic leukaemia
- Enteric fever (typhoid/paratyphoid)
- Anti-NMDA receptor encephalitis
- Takayasu's arteritis
- Acute fatty liver of pregnancy
- Lead poisoning
- Raised intracranial pressure
Specific differential diagnosis
TYPES
EaracheEye pain
Facial pain
Jaw pain
Mouth pain
Occipital headache
Unilateral headache