Pressure from your big toe may force your second toe out of alignment, sometimes overlapping your third toe. An advanced bunion may make your foot look grotesque. If your bunion gets too severe, it may be difficult to walk. Your pain may become chronic and you may develop arthritis. Most bunions are treatable without surgery.
Prevention is always best.
To minimize your chances of developing a bunion, never force your foot into a shoe that doesn't fit. Choose shoes that conform to the shape of your feet. Go for shoes with wide insteps, broad toes and soft soles. If you already have a bunion, wear shoes that are roomy enough to not put pressure on it. This should relieve most of your pain.