Dear maij,The redness and stinging sensation in your eye with an eyelash found is a minor trauma to your eye which is caused by the FB I.e the eye lash which was rubbing onto your conjuctiva and cornea.These micro trauma causes congestion and chemosis after you rub your eyes vigorously and there is leakage of fluid after rupture of fine blood vessels.Usually it get absorbed after few days.But if you have allergy to soap or any infection like conjunctivitis then you may get stinging sensation with pain and redness.As if for now just use any tear substitute like refresh tears and if your signs doesnt improve in a day or two show to your nearest ophthalmologist.....TC...dr Ajay Shankar Kar ,cornea consultant,Sankar foundation eye hospital,Vizag