Glaucoma is another possibility which is more likely than migraines and must be ruled out by seeing an ophthalmologist as the loss of vision in this condition is irreversible. Raised eye pressure in this condition can cause pain behind the eye and also watering and headache. Since, the tears drain through the eye into the nose, you have watering from the nose as well. Your eye pressure will be measured and you will also be required to do a field charting done along with optic disc assessment. You must see an ophthalmologist. Best wishes to you.
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