A bunion or hallux abducto valgus deformity is a bony deformity of the 1st metatrsal and big toe joint. The causes include heredity, injury arthritis and other things.
I am not familar with anyone who can "eliminate" a bunion with ultrasound which is merely a therapy that heats up the tissue. It works on the same principle that your microwave does. It bounces sound waves off a solid object and heats it up.
I'm sorry to disappoint you, but you need to see a podiatrist and get more information about your problem
Vivian Abrams DPM