Persistent headaches, especially sudden severe headaches, may occur before a stroke. This could be due to vascular spasms caused by ischemia in brain tissue.
You may suddenly feel numbness or discomfort on one side of your body while sleeping or resting, accompanied by weakness in the same side's limbs, crooked mouth corners, and even slurred speech.
Drooling during sleep could be a sign of localized ischemia in brain tissue, potentially accompanied by headaches and drowsiness.
Blurred vision in one or both eyes or even temporary blindness may occur, caused by insufficient blood supply from the internal carotid artery's ophthalmic artery branch.
Before a stroke, sudden slurred speech or inability to speak may occur. Some may be able to speak but cannot understand others.
Blood pressure may suddenly rise or fall before a stroke, especially in patients with large vessel disease, so attention should be paid to the use of antihypertensive drugs.