Sudden tightness in glute

Oh no, I hope you are feeling better! My husband had something similar happen during a walk, just out of nowhere the glute seized up and he could barely move that night. We went to the polyclinic the next day and the doctor said it was likely a muscle strain or spasm, and recommended rest, some gentle stretching, and heat or ice on the area. If the tightness is not improving after a day or two or the pain gets worse, it is worth going to get it properly checked out lah.