Just a thought --- Charcot-Marie-Tooth Disease is an inherited peripheral neuropathy. Not being able to stand on your tiptoes or your heels is something that can happen along with weakness and atrophy in your lower legs and feet and your hands and forearms. Some have pes cavas and some have flat feet. Again, CMT is an atrophy and it is inherited. It is often misdiagnosed as something else. MS is an autoimmune disease.

Is there anyone in your family who has these type of symptoms? CMT symptoms can show up when you are young, old, or in-between. There are DNA blood tests for it as well as EMG/NCV tests, etc.

Kitt