A red patch inside the eye is considered to be caused by subconjunctival hemorrhage, which is caused by the rupture of small blood vessels on the surface of the eye. rupture of small blood vessels on the surface of the eye. In addition, patients with systemic blood disorders or oral aspirin, warfarin and other drugs are prone to this symptom. Subconjunctival hemorrhage usually does not affect vision, so many patients may not have obvious eye discomfort, if the eye has a foreign body sensation, consider ordering artificial tear eye drops to relieve the symptoms, mild bleeding spots, 3-7 days can be completely absorbed, if the serious conjunctival hemorrhage caused by trauma Subconjunctival hemorrhage may take longer to absorb.