Dilated blood vessels might cause tiny, temporary red marks (called spider nevi) on your face, shoulders and arms.

The new blood vessels can also grow into the angle of the anterior chamber of the eye and cause neovascular glaucoma.

Dilated blood vessels can cause nasal congestion (stuffy nose).

Bleeding within the muscle from ruptured fibers and tiny blood vessels can cause swelling.

Laser photocoagulation must be done before the abnormal blood vessels cause irreversible damage to the retina.

By themselves, these blood vessels do not cause symptoms or vision loss.

Small blood vessels (microvascular), causing damage to the eyes and kidneys.

The clots block blood vessels causing heart and respiratory failure.

A ruptured blood vessel in her brain would cause an instantaneous loss of consciousness and rapid death.

Immature blood vessels may cause small red patches called stork bites.