What Is The Treatment For Severe Headache?

hi i m sukhveer. my mother is 48 year old and she has headache problem from last 10 year and it's never stop, it's just ok when she sleep but it's again start when she wake up. but it's continue all the day. it's happening from last 10year. all the reports are normal and doctors failed to find the problem. she eat very well and she sleep very well. her headache very painful.pls help us because we don't know what we should do now? what is the problem? pls let me know. thanks.