Recently 8- 9 years whenever I used to travel for my exam in returning of my journey I used to get headache with vomiting until everything comes out it continues for 3-5 hours and it  also happen whenever I do fasting similar conditions happen at the end of fasting of 12 hours and recently 3-4 years same headache conditions is prevailing without traveling and fasting . It happen to me 4- 6 times per year. Headache location is  above ear on both sides of the head. It's moderate type and it's goes when everything which I had eat 2 - 3 hours comes out and everything become normal. I do have habit of taking stress recently in past few years due to that I used to eat less. In vomiting it take one hours for me to take out everything in that I usually became tired and even loose my body water it feel like he'll for me at that time