When it comes to working out the muscles in your body, there is a fine line between soreness and overdoing it. If your body is sore the next morning you wake up after a run that is normal; especially if you only run once in a while. However, this is totally different if you are experiencing legitimate pain that is preventing you from partaking in daily activities. The following day, if you can’t run without a limp or serious discomfort then you may have an issue.
In this case, you should rest your body and avoid running any further. If the pain continues to persist, you may need to seek medical attention. But, chances are you simply pulled a muscle and need to stretch it out.