HI, After i participate in sports like football or an activity that requires physical exertion I will start to get a headache. My head will feel tight, as if someone is squeezing it, and when i stand up i will feel very dizzy. This has got alot worse recently. I have had MRI and CT scans and all came back fine. I started taking Ibuprofen and a Glucose gel befor football. I started to notice a difference but unsure if its due to doing this or the fact i was paying football on a more regular basis. Since football finished for the season the headaches have got worse. Any one have any ideas what the cause could be or any tips to help?