How long does it take for eye redness caused by external impact to heal?

Generally, eye congestion caused by external impact will subside within 1 to 2 weeks, but the exact recovery time depends on individual care and treatment.

If the eye is injured by external force and only results in minor blood vessel rupture in the conjunctiva of the white part of the eye, proper care—such as timely local cold and hot compresses using ice packs and warm water bags, along with taking blood-activating, stasis-resolving, and anti-inflammatory medications—can lead to resolution in about one week. However, because external trauma to the eye can affect local blood circulation, more severe injuries such as hyphema (bleeding in the anterior chamber), vitreous hemorrhage, or retinal bleeding, especially when accompanied by inadequate local care, may prolong recovery, potentially requiring up to two weeks or even longer for the symptoms to resolve.

After an eye injury resulting in congestion, it's important to promptly visit an ophthalmologist for appropriate examinations to assess whether there is any damage to the cornea, retina, or eyeball. CT scans may also be necessary if needed.