My doctor said nothing can be done for foot arthritis, is this true?

No. There are many treatments for arthritis in the foot ranging from inserts, braces, medication, and surgery. An orthopedic surgeon trained in foot and ankle surgery can best evaluate you and provide the best options.
No. There are a variety of treatment options to help with arthritic foot problems. A good stiff shoe with a good arch support may be a good start. See your podiatrist for an evaluation and treatment options. Dr l.