Hi,welcome to healthcaremagic.com it seems that your problom may be due to-overstraing of mind or eyes, especially if you are working.It may also be due to mineral deficiency
esp. calcium magnacium etc as you r 40+
So try to be mentally relaxed -do some facial & eye exercise,take break during your mental or eye work (dont do it continuously). furthermore u need to take extra dietary mineralsthrough fruits, juices,milk, cottege cheese green leafy vegetables (For calcium)
As for as medication is concerned calcium tablets can help you prescribed by a physician.