Subconjunctival hemorrhage (broken blood vessel in eye)
2021年9月21日 · The most obvious sign of a subconjunctival hemorrhage is a bright red patch on the white (sclera) of your eye. Despite its bloody appearance, a subconjunctival hemorrhage looks worse than it is and should cause no change in your vision, discharge or pain. Your only discomfort may be a scratchy feeling on the surface of the eye.
Subconjunctival hemorrhage (broken blood vessel in eye)
2021年9月21日 · Subconjunctival hemorrhage is a broken blood vessel in the eye — learn more about this common, harmless condition that clears up without treatment.
Subarachnoid hemorrhage - Symptoms and causes - Mayo Clinic
2024年10月26日 · The aneurysm can burst and cause bleeding in the space between the brain and the tissues covering the brain, known as the subarachnoid space. A brain aneurysm is the most common cause of a subarachnoid hemorrhage.
Subconjunctival hemorrhage (broken blood vessel in eye)
2021年9月21日 · Subconjunctival hemorrhage is a broken blood vessel in the eye — learn more about this common, harmless condition that clears up without treatment.
Intracranial hematoma - Symptoms and causes - Mayo Clinic
2024年6月8日 · Causes. The most common cause of an intracranial hematoma is a head injury. A head injury that causes bleeding within the skull may result from motor vehicle or bicycle accidents, falls, assaults, and sports injuries. If you're an older adult, even mild head trauma can cause a hematoma.
Diabetic retinopathy - Symptoms & causes - Mayo Clinic
2023年2月21日 · Vitreous hemorrhage. The new blood vessels may bleed into the clear, jellylike substance that fills the center of your eye. If the amount of bleeding is small, you might see only a few dark spots (floaters). In more-severe cases, blood can fill the vitreous cavity and completely block your vision.
Viral hemorrhagic fevers - Symptoms and causes - Mayo Clinic
2024年11月12日 · Causes. Viral hemorrhagic fevers are spread by contact with infected animals. The viruses that cause viral hemorrhagic fevers live in many animal hosts. Most often, the hosts include mosquitoes, ticks, rodents, nonhuman primates or bats. How is it transmitted? Mosquito or tick bites spread some viral hemorrhagic fevers.
Petechiae Causes - Mayo Clinic
2005年7月24日 · Tiny blood vessels, called capillaries, link the smallest parts of your arteries to the smallest parts of your veins. Petechiae form when capillaries bleed, leaking blood into the skin. The bleeding may be caused by: Prolonged straining; Medicines; Medical conditions; Prolonged straining
Eye floaters - Symptoms and causes - Mayo Clinic
2024年7月2日 · Most eye floaters are caused by age-related changes that occur as the jelly-like substance (vitreous) inside your eyes liquifies and contracts. Scattered clumps of collagen fibers form within the vitreous and can cast tiny shadows on your retina.
Wet macular degeneration - Symptoms and causes - Mayo Clinic
2024年12月11日 · Wet macular degeneration is an eye condition that causes blurred vision or reduced central vision. It is a type of age-related macular degeneration where blood vessels leak fluid or blood into part of the retina known as the macula (MAK-u-luh). The macula is responsible for central vision.