1. Difficulty walking and running.
In childhood, symptoms appear on the patient, but not as severe as they appear when he grows old, where the first symptom that may worsen rapidly is the difficulty of running and even walking in some cases due to weakness of the muscles responsible for these tasks. The matter over time until it reaches paralysis and the inability to move completely. Therefore, attention must be paid to any sign, even if it is small, to avoid serious life-threatening complications.