Severe headache nonstop

My mother is having GCA since march 2020 she is under severe headache especially left side since that time period we have tried different doctors all the medicine but no relief this pain has snatch her normal Life, we are depressed to see her like this every day and couldn't help her
Please do remember her in your precious prayers and please if anyone has gone through the same thing and now cured please do let me know how you did it

Regards
A worried helpless daughter