Hi All, I am a new member in the forum but have been living with POTS for a number of years. I was diagnosed back in 2003. Recently, I have been very symptomatic (excessive fatigue, heard palpitation, increased heard rate, sort of breath, etc.) and am nervous that there is another condition going on as well as POTS. I have seen a number of doctors and am going to continue to go but, nobody has discovered any diagnosis other than POTS with no underlying causes. One of my symptoms that I wanted to ask about and see if it is fairly common is muscle twitching after walking. This happened to me years ago but, has started up again recently. After going on about a .5 mile or less walk I have twitching that I can feel throughout my leg muscles. It is happening fairly deep in my leg muscles so, I cannot see if with my eyes but, I can feel it for a number of minutes after walking. So, just curious if this is a common symptom for some on this forum? thanks, Kate