Our Health Library information does not replace the advice of a doctor. Please be advised that this information is made available to assist our patients to learn more about their health. Our providers may not see and/or treat all topics found herein. Here is what to do if you notice an air bubble in the barrel of the syringe. Injecting a small air bubble into the skin or a muscle is usually harmless. But it might mean you aren't getting the full dose of medicine, because the air takes up space in the syringe. Here is what to do if you bend or break a needle while giving yourself a shot. If you can't remove the needle, or if a broken part of the needle didn't come out, you need medical attention. A doctor will help remove the needle. If you see blood in the syringe, it means you might have hit a blood vessel under the skin. This usually isn't harmful. If you see blood in the bottom of the syringe (hub) before you push in the plunger: To help prevent infection when giving yourself a shot, always wash your hands, clean the skin where you are giving the shot, and keep your needles sterile. Contact your doctor if you have symptoms of infection at the site of the shot. These include: Your doctor or nurse will show you where you can give yourself shots. Give your next shot in another area, or at least an inch away from your last shot. To rotate sites, keep track of your shots. You can use a calendar, journal, phone app, or diagram of a body to note the date and where you gave the shot. Bruising means you might have hit a small blood vessel under the skin. This usually isn't harmful. If you have a bruise, use other areas for your shots until the bruise heals. Many people don't like needles, but they learn to use them because it's important for their health. You can learn how to give yourself shots. See if someone at home can help you with your shot. A nurse can also help you feel more comfortable giving yourself shots by helping you practice what you need to do. The nurse may show you how to practice on a firm fruit like an orange and can help you learn the way that works best for you. Learning about the process of giving yourself shots can help you feel more comfortable doing it. Current as of: January 26, 2026 Author: WebMD Ignite Staff Current as of: January 26, 2026 Author: WebMD Ignite Staff Clinical Review Board This information does not replace the advice of a doctor. WebMD Ignite disclaims any warranty or liability for your use of this information. Your use of this information means that you agree to the Terms of Use and Privacy Policy. Learn how we develop our content. To learn more about WebMD Ignite, visit webmdignite.com. © 2024-2026 WebMD Ignite.Topic Contents
Common Questions About Giving Yourself Shots
How do I get rid of an air bubble in the syringe?
What if I break or bend a needle?
What if I see blood in the syringe?
What about infections?
How do I rotate injection sites?
Is bruising okay?
What if I don't like needles?
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Clinical Review Board
All WebMD Ignite education is reviewed by a team that includes physicians, nurses, advanced practitioners, registered dieticians, and other healthcare professionals.
All WebMD Ignite education is reviewed by a team that includes physicians, nurses, advanced practitioners, registered dieticians, and other healthcare professionals.
Our Health Library information does not replace the advice of a doctor. Please be advised that this information is made available to assist our patients to learn more about their health. Our providers may not see and/or treat all topics found herein. Current as of: January 26, 2026 Author: WebMD Ignite Staff Clinical Review BoardCommon Questions About Giving Yourself Shots
All WebMD Ignite education is reviewed by a team that includes physicians, nurses, advanced practitioners, registered dieticians, and other healthcare professionals.

