Bunion correctors are braces or splints that are worn at night and are supposed to improve the alignment of the big toe in those who have bunions. Bunions are an enlargement of the big toe joint of the foot that is associated with what is called a valgus deformity of the big toe. The brace holds the big toe in the right place while sleeping to try and correct the deformity. There certainly is a lot of debate as to if that actually works or not. The problem with the concept is that bunions are caused by a combination of an inherited component, foot biomechanics and the use of tight incorrectly fitted footwear. So during the day you have all those forces producing the bunion and the hope is that wearing the bunion corrector at night over comes those forces that occur when walking during the day, which is probably not possible.
So should you use bunion correctors? Thee is some evidence that they can actually improve the ankle of the big toe by a few degrees after a month or so of use. There has been no research done to see if that improvement gets any better with a longer term use or if that improvement is only temporary if you stop using the brace. Despite that, many professionals recommend still using them even if they do not improve the angle of the toe. This is because, even if they do not correct the toe, they will still keep the toe mobile and flexible which is a good think for that toe over the longer term as the bunion condition progresses. As well as using these correctors it is also probably important that you get professional advice about the best shoes to wear to prevent the bunion from getting any worse and also do some exercises to improve the muscle strength around the area.