Toe separators, splints, padding and orthoses.
Padding over the bump is a standard first-line option 2. Orthoses with a toe separator showed the best effect on the big toe's angle in one meta-analysis, but the effect was modest and only nine studies qualified 4. Splints and braces won't correct the deformity, and any benefit from orthotics is unlikely to last long term 2. Inserts and splints are usually fitted by a podiatrist 1; we'll refer you if they're worth trying.
