For about 3 months now, I have been experiencing dizziness as well as heaviness, tingling sensation, and an overall weak feeling in my left arm mostly, but it also has traveled down the entire left side of my body. I am a 24 yr old healthy female. I went to the ER when it first started and was really bad. My entire left side was tingling, including the left side of my face, my left arm, leg and foot. It only happens on the LEFT side. When I walked it felt like my left ankle was just going to give out on me, it felt really weak. I was also EXREMELY dizzy. I was admitted and these symptoms were strong and lasted for over a day. I was in the hospital for 2 days and they ran a CT scan, an MRI, blood tests, and all came back negative. Gradually my symptoms started to fade. They released me after they had done every test they could think of without knowing what was causing them. Since then my symptoms have been coming and going, but not to the same intensity that they were when I went to the ER. Sometimes I will be fine and then it will just come on slowly and last for a few hours and then fade away. This happens daily if not every other day. It doesn't matter if I'm sitting or standing or being active or inactive, I will just start to feel really dizzy and off balance and then the arm heaviness, and ankle weakness will set in. I am going to an Ear, Nose, and Throat doctor so he can run tests as well. I had an extremely bad ear infection about 6 months ago where my equilibrium was off and I was dizzy. I am hoping it's some kind of virus that can be treated and not something serious like my heart or MS or anything like that. If anyone has had similar symptoms or has been diagnosed with something, PLEASE let me know what you think. I cannot keep going on without getting any answers. There has to be an explaination out there somewhere! Thank you so much for your comments.