Know the signs and what to do for this dangerous increase in body temperature.
Disease
Benign paroxysmal positional vertigo (BPPV)
Learn more about the symptoms, causes and treatment of intense dizziness episodes.
Disease
Hyperoxaluria and oxalosis
Learn about symptoms, causes, diagnosis and treatment for these rare kidney problems.
Disease
Posterior cortical atrophy
This rare neurological syndrome that's often caused by Alzheimer's disease affects vision and coordination.
Disease
CSF leak (Cerebrospinal fluid leak)
Cerebrospinal fluid leaks may start in the brain or spine, causing headaches, dizziness and other symptoms.
Disease
Vasculitis
This swelling and irritation of the blood vessels may thicken and weaken blood vessel walls. It can restrict blood flow and damage organs.
Disease
Spinal headaches
These headaches can happen after a spinal tap procedure or spinal anesthesia, and usually don’t require treatment.
Disease
Thunderclap headaches
These headaches are sudden and severe, and can warn of a life-threatening condition — so seek immediate medical attention.
Disease
Infectious diseases
Viruses, bacteria, fungi and parasites all can cause infections. Find out more about how to prevent and treat these conditions.
Disease
Anaphylaxis
Anaphylaxis, a severe allergic reaction, is an emergency. Learn who's at risk, what to watch for and what to do when it occurs.
Disease
Brucellosis
Brucellosis is an infectious bacterial disease often spread via direct contact with infected animals or contaminated animal products.
Disease
Oral lichen planus
This ongoing inflammatory condition results in white, lacy patches or red, swollen tissues or open sores inside your mouth that may cause burning or pain.