Were you using the same needle more than once? If you did that might be a problem. It is always recommendable to change sites as much as possible. Normally that can be accumulation of the oil in that area and should be absorbed by your muscle ( body) but leave that area alone. If it gets worse, go seek medical attention asap. You may want find someone to help you with the injections, having someone will expand you injections sites.Best of luck!