How is an eye bloodshot for no reason to return a responsibility

1, foreign body stimulation

If dust, tidbits, hair and other foreign bodies enter the eye, it will stimulate the conjunctiva, leading to symptoms of congestion in one eye.

2, eye trauma

unilateral eye by external pressure or collision, may be subconjunctival capillary rupture, so there will be more obvious congestion and swelling, and accompanied by pain.

3, eye inflammation

such

as bacterial conjunctivitis, allergic conjunctivitis, blepharitis, keratitis, etc., in inflammation stimulation, patients will appear one eye congestion, pain, foreign body sensation and other symptoms.