The bony bump is not a tumor or malignant growth. Also arthritis of the joint of the great toe can occur. Causes Bunions are common. Many people have them. Women more frequently than men.
Improper shoes are undoubtedly a factor.
Typical woman's pumps - high heels with narrow and pointed toe boxes certainly have been implicated as a major cause. Of course, this depends on the severity of the problem. If one has a flat or pronated foot, an arch support, orthotic, or insert such as a scaphoid pad will better position the foot, thus relieving the pressure on the great toe. Medicine,thearpy, braces, straps,exercises, etc. will not help. Foot surgery in this age group may be risky and therefore it may be wiser to consider shoe corrections or custom made shoes.