Hello Elena
I am afraid, can not tell you how many sessions exactly you need at the moment. A headache can be experienced due to variety of reasons, acupuncture helps every case individually. I am afraid it is hard to give exact time in that aspect. After we take your case history, there might be really simple life style changes and acupuncture will help you with your symptoms, or you may have other underlying issues are needed to be addressed by other health care professionals. However in general we recommend and see changes around 6-8 sessions.