Multiple Sclerosis (MS) is a neurological disease that affects the Central Nervous System, made up of the brain and spinal cord.

The immune system normally protects the body, but in MS, it mistakenly attacks the myelin sheath of nerve cells (neurons). Nerves extend throughout the body, so multiple sclerosis can manifest in many parts of the body and in very different ways.

Not all symptoms appear in everyone, nor do they appear with the same intensity. This is why it presents differently in each person (it is heterogeneous) and is often called "the disease of a thousand faces."

Most cases are diagnosed in people between 20 and 40 years of age (precisely when they are designing their life plan), but it can also appear in children, adolescents, and the elderly.