I bent over to put on my shoe, and right then my lower back started hurting now lower spine & buttocks has pain & pressure going on 3 days. now, ?

Sciatica?: A pain radiating from the buttock down the leg is called sciatica, and could be due to a herniated spinal disc, putting pressure on a nerve root. Could also be local muscle pain. Physical exam can elicit important signs- if exam is concerning for sciatica, an MRI might be needed to diagnose.

Disc herniation or: Discinjury muscle strain exhale when you bend over.