Subconjunctival Haemorrhage

Careful examination of the eye will easily confirm that its redness is due to blood rather than dilated blood vessels, and the redness might be noticed by someone other than the patient. The condition is common and resolves in about 10-14 days. It is extremely unusual for a blood dyscrasia to present with subconjunctival haemorrhages. Although vomiting or a bleeding tendency can also be rare causes, the normal practice is to reassure the patient rather than embark on extensive investigations, because the majority of cases are caused by spontaneous bleeding from a conjunctival capillary. This might be spontaneous and can result from a sudden increase in venous pressure, for example after coughing.

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