Subconjunctival haemorrhage is collection of blood below the conjunctiva. The commonest cause for subconjunctival haemorrhage is injury
. Even trivial injury like vigorous rubbing of the yes can cause it. It is usually a self limiting condition and it does not requires treatment. It resolves over a period of 4-6 weeks.
subconjunctival haemorrhage is not related to or associated with chest pain
, so no need to worry.