So you use the thumb and the Index finger of your picking hand and use them to stretch the fingers from your Fretting hand. Hold every stretch for around 15 seconds in the beginning and keep increasing the duration of the stretch gradually. Relax your fingers after performing the stretch, this is crucial.
Is it good to stretch hands?
Hand and finger exercises can help strengthen your hands and fingers, increase your range of motion, and give you pain relief. Stretch only until you feel tightness. You shouldn't feel pain.