Complications of an EMG are not common, but any medical procedure involves risk and potential complications. Complications of an EMG are generally minor, temporary side effects. Complications of an EMG include: Bleeding Bruises Infection Muscle soreness or tenderness Some people who should not have an EMG include those who: Take blood thinning medication, which increases the risk of bleeding into the muscle Have a moderate to serious skin infection, which can spread to the muscle Reducing your risk of complications You can reduce the risk of some complications by following your treatment plan and: Following activity, dietary and lifestyle restrictions and recommendations before your procedure and during recovery Informing your doctor if you have any metal in your body, including screws, pins, plates, pacemakers, implants of any kind, intrauterine devices (IUDs), and bullet fragments Notifying your doctor right away of any concerns, such as bleeding, fever, or increase in pain Removing all jewelry and metal objects and leaving them outside the procedure room. This includes glasses, credits cards, hair accessories, and removable dental work. Taking or stopping your medications exactly as directed Telling all members of your care team about your medications, medical history, and allergies