What Are Potential Causes for a Sudden Inability to Walk?

Several conditions can cause a sudden inability to walk. The most serious are those affecting the brain or spinal cord, such as strokes or head injuries and spinal cord injuries that cause paralysis. These conditions require immediate medical evaluation, as early diagnosis leads to the best treatment outcomes. Other nerve conditions can suddenly affect ability to walk such as Guillain-Barré syndrome (a disorder where the immune system attacks the nerves), multiple sclerosis flares, or compressed nerves in the spine. Some people may experience sudden weakness from conditions like myasthenia gravis, a neuromuscular disorder where muscles become increasingly weak with use. Sudden problems with balance can suddenly impact walking. Conditions affecting the inner ear or vestibular system, such as vertigo or Meniere's disease, can cause severe dizziness and make walking difficult or impossible. These balance disorders often come on suddenly and can be accompanied by nausea, hearing changes, or a spinning sensation. Painful conditions can also lead to sudden difficulty walking. For example, severe back pain from a herniated disc, sudden onset of arthritis in multiple joints, or intense muscle cramps can make walking extremely challenging or impossible. Regardless of the cause, if you cannot walk normally, seek medical evaluation promptly.