Patient with a spontaneous subconjunctival hemorrhage - conjunctiva is the clear tissue that covers the white of the eye (the sclera) and lines the inside of both eyelids. A subconjunctival hemorrhage is blood from a tiny broken blood vessel located between the conjunctiva and the underlying sclera. - The patient's mom took her out of school for a week because students were afraid of her. The cause of a subconjunctival hemorrhage isn't always known. The following actions may cause a small blood vessel to rupture in your eye: Violent coughing Powerful sneezing Straining Vomiting