Why do i often get headache when i skip even single meal and go out in summers plus especially during travelling?

Drop in Blood Sugar: A drop in blood sugar levels can lead to a headache and if your body is used to regular times for meals it will experience a slight drop at the time you generally eat. Since your brain needs fuel in the form of glucose to function, it may cause a headache to develop. If you know you will need to skip a meal or delay eating, plan ahead by taking a light snack to tide you over!