Prescription orthotics are divided into functional orthotics and accommodative orthotics. Functional orthotics are used to control pain caused by abnormal motion and to treat injuries like shin splints or tendinitis. Functional orthotics are often made from a semi-rigid material. Accommodative orthotics are normally softer to provide your feet with additional cushion and support.
If your bunion is causing you pain when you put pressure on your foot, your podiatrist might recommend an accommodative custom orthotic.