Most of the times I am suffering from morning headache that will remain for whole day or sometimes extended to 2-3 days. Pain intensity keep increases til evening and next morning it started with same mild pain if continues to 2-3 days. Most of the times it started with half sided pain. Actually, from that side which was injured while an accident some years ago about 3-4 years. I am suffering with this pain from few years actually I didn't know the exact duration.