- Stroke
A stroke occurs when blood and oxygen to the brain are cut off, and causes numbness, confusion, and more.
- Botulinum toxin (Botox) injection
Botulinum toxin side effects may include pain and tenderness at the injection site, headache, nausea and more.
- Transient ischemic attack (mini-stroke)
Transient ischemic attacks cause headache, numbness, tingling, or weakness in the face, arm, or leg, and more.
- Multiple sclerosis
Multiple sclerosis is a disease of the nervous system causing difficulties with balance, speech, and movement.
- Sickle cell disease
Sickle cell disease symptoms include repeated infections, yellow skin, fatigue, dizziness, pain, and more.
- Lazy eye
Lazy eye occurs when the brain favors one eye over the other.
- Ocular migraine
Ocular migraine usually refers to a type of migraine that can cause temporary blindness in one eye.
- Optic neuritis
Optic neuritis is an inflammation of the optic nerve, and causes blurred or dimmed vision and pain.
- Retinal detachment
Retinal detachment causes floaters in your vision, flashes of light, blind spots, loss of vision, and more.
- Horner's syndrome
Horner syndrome is a rare condition that can cause a drooping eyelid, decreased sweating, and a small pupil.
- Myasthenia gravis
Myasthenia gravis is caused by abnormal immune responses that weaken muscles, particularly of the face.
- Floppy eyelid syndrome
With floppy eyelid syndrome one or both upper eyelids become droopy, rubbery, and flip inside out easily.
- Methanol poisoning
The symptoms of methanol poisoning include trouble breathing, blindness, headache, dizziness, and more.
- Brain tumor
Primary brain tumors are often benign but can cause seizures, ongoing headaches, or loss of coordination.
- Brain infection
A brain infection is inflammation of the brain or spinal cord and can cause nausea, fever, seizures and more.
