I got HIFU treatment four days ago (face and neck area). Since then I have strong headache.

There are pain around the cheekbone, jaw, brown bones (sensitive when I touch these areas) but the constant headache what bothers me... i took painkillers but they don't help. When can i expect the headache to go away? Is it 'normal' to have headache after HIFU? Thank you for the answer in advance.