All symptoms of leg pain caused by the conditions listed above are often referred to as sciatica. This is because the pain often radiates along the sciatic nerve, which originates with certain nerve roots in the low back and runs through the back of each leg into the foot.
Trackback - A method by which a blogger receives notification which other bloggers link to his or her blog entry
A push notification is a way for an app to send you a message or to notify you without you actually opening the app. The notification is pushed to you without you needing to do anything. You can think of it like the app sending you a text message, although notifications can take on several different forms. One common push notification takes the form of a red circle with a number in it that appears on the corner of the app's icon.