Responding to a stroke in the right time is the best way to reduce brain damage to someone who has a stroke. Because the stroke cuts the supply of oxygen and blood to the brain, you must return the supply as quickly as possible because the stroke can be fatal. There are a number of warning signs that you can look for, as well as several steps you can take to get the patient ready when emergency services arrive. This action can help save lives from stroke victims.

1
Learn about two types of strokes. There are two types of strokes. The most common type which includes more than 90% of stroke attacks is called ischemic stroke. This happens because the blood flow to the brain decreases, and is usually due to plaques in the carotid arteries rupturing and flowing downstream. The ruptured plaque continues to move to clog arteries and blood flow to the part of the brain. Symptoms experienced when attacked by a stroke will depend on which part of the brain is attacked, for example in the part responsible for the ability to speak, walk, or move one side of the body.
Another type of stroke that is not so common is when there is bleeding in the brain. This is called a hemorrhagic stroke. This occurs when a blood vessel or a collection of blood vessels called aneurysms grow larger and erupt causing a stroke. Although rare, this type of stroke can cause the worst headaches you have ever experienced.
You have to know the difference because most stroke victims you might encounter don't experience pain. The absence of pain makes you late to recognize and deal with victims, which in turn can cause severe long-term nerve damage or even death. [1]

2
Notice whether the victim's face appears to be sagging. It is very important to recognize the initial symptoms of a stroke so you can confirm it. Medical professionals use the FAST acronym to remember what to look for when the stroke attacks and how fast the response must be made. The letter F stands for Face, which means you have to pay attention to whether the victim's face sags. Notice whether one side of the face is drooping or hanging. Ask the victim to smile. The affected side of the face cannot be lifted like the other side.
You can also ask the person to raise an eyebrow, and the side that has the stroke will not be able to respond. [2]
Check if the victim's arm is weak. The letter A in FAST stands for Arms, which means you have to check whether the arm is weak. Ask the victim to lift the arm in front of the body, and lift it to shoulder height. Press his arm down slowly and ask the person to resist your pressure. Maybe he can still move his arm even though he is having a stroke, but the affected arm will fall down due to weakness when you press it.
If he is unable to lift the other arm, or his arm cannot be raised at shoulder height, it means that his arm has suffered weakness. [3] [4]