I can think of two possible causes. 1 being blood pressure. Dbol will greatly increase water weight and this can cause high BP. Then strenuous exercise could be pushing it up even further causing a headache, which can be a sign of high BP. Make sure BP is good. If it isn’t, see your Dr ASAP. lisinopril is a great med. I use it year round at a low dose and especially make sure I’m using it while on Dbol or Tren. Other thought is a tension headache. This is also possible. Being on gear, you may be pushing even harder than normal and this is causing a tension headache. I would check BP first and make sure this is not the case.