got dehydrated

I had a terrible headache last Sunday. The worst headache I ever had lately. I think it was because I didn't drink enough water. I took aspirin yet it did not work. In other words, I got dehydrated. It is a common case during summer. I just kept on drinking water. Well, It is too late for me. I already got dehydrated - so I just took a rest. When I got up the other, I felt better. I thought of drinking 4 liters of water. That will be my goal every day. I really don't want to experience any headache again. I realized the great importance of water to our body. I learned my lesson.