KineMargauxwhat it claims
To relieve tension-related headaches, lie on your back at the edge of a bed and gently let your head hang off the edge for 2 to 5 minutes to stretch the cervical area using gravity, adjusting the height with a cushion if needed and using your hands to reposition your head before getting back up.
Science largely validates the link between neck tension and tension-type headaches. A meta-analysis of randomized controlled trials (RCT) published by Luedtke et al.
