You had better not do any exercise in recent days. Subconjunctival hemorrhage can be ascribed to fracture of the vessel of ocular conjunctiva of itself or the fracture caused by the external force due to the frail blood vessel of ocular conjunctiva. The causes of hemorrhage include trauma, pressing of neck, violent cough, conjunctiva inflammation, ateriosclerosis, high blood pressure, nephritis, diabetes mellitus, bleeder disease, helopyra, exogenous febrile disease or cholera. Generally, sufferers do not need to receive a treatment and it can disappear naturally about a week later. But if the hemorrhage occurs frequently, you need to watch out and go to hospital for an overall examination so as to check out whether you suffer other diseases such as high blood pressure, diabetes mellitus, etc. and help you receive a timely treatment.