Multiple sclerosis is the disease with a thousand faces. The symptoms are diverse and vary in expression. Spasticity is one of the most common symptoms of MS. It is not only painful but also often associated with limitations in social life and work for those affected. Many do not realize that they can positively influence spasticity through their own behavior. This particularly involves being aware of one's own body, recognizing and avoiding triggers, and knowing what measures can be taken to prevent or address spasticity. The guide provides a current overview of modern diagnostics and therapy for spasticity and highlights how behavioral changes, everyday movement, or suitable aids can significantly improve the quality of life for those affected.