The Best Places to Inject Semaglutide and How to Rotate Them

Step 1: Choose your site for this week

Wegovy is injected subcutaneously, into the fatty tissue just beneath the skin, not into muscle. If you want a thorough overview of the places you can inject semaglutide, including how each one compares for comfort and accessibility, the approved options are the lower abdomen (avoiding the two-inch zone around the navel), the front and outer part of the thigh, and the outer upper arm. All three deliver the medicine into the bloodstream at a broadly similar rate, so your choice each week can be led by convenience and comfort rather than clinical preference.

The abdomen is where most people start. It offers a generous, accessible area of subcutaneous tissue, and you can reach it easily without anyone's help. The thigh works well when you are sitting down and is useful when you are away from home. The upper arm is a practical option if a partner or carer can assist, because angling a pen reliably against your own upper arm takes some practice. The Wegovy injection sites guide goes into more detail if you would like to compare the options side by side.

Avoid any area that is bruised, tender, red, or has visible changes to the skin. If you are also injecting insulin or another subcutaneous medicine, use a different site to avoid overlapping puncture points.

Step 2: Rotate the site each week

Staying in the same small patch of skin week after week causes the fatty tissue to harden over time. This is called lipohypertrophy, and it matters because injecting into thickened tissue can blunt absorption of the medicine. The fix is straightforward: move to a different approved zone each week, and within that zone, vary the exact spot by at least a couple of centimetres from where you last injected.

A simple rotation pattern works well for most people. Week one: left side of the abdomen. Week two: right side. Week three: left thigh. Week four: right thigh. Then return to the abdomen, perhaps a little higher or lower than before. There is no single correct scheme, what matters is that you keep moving around. The guide to the best single site for your situation covers what to do if one area consistently causes more discomfort than the others.

Some people mark a simple diagram or use a note on their phone to track where they injected last. A small habit like that makes rotation second nature within a few weeks.

Step 3: Prepare the skin and use the correct technique

Clean the area with an alcohol swab and let it dry fully before injecting, wet skin stings more and may introduce moisture into the injection site. Pinching a small fold of skin gently helps with leaner areas and gives you a clear subcutaneous target. Hold the pen firmly against the skin at a 90-degree angle, press the button, and keep the pen in place for the count recommended in your leaflet to ensure the full dose is delivered. Then release the skin fold and apply gentle pressure, do not rub.

Always use a new needle for each injection. Reused needles blunt quickly, which makes injections more uncomfortable and increases the risk of skin irritation. A pack of sterile alcohol swabs kept with your pen makes the prep step easy to stick to. Dispose of used needles and pens safely in a dedicated sharps container rather than in household rubbish.

The full injection technique guide covers needle length, pinching and angle in more detail, worth reading if you are just starting out.

What to watch for at the injection site

Mild redness, a small raised area, or brief tenderness at the injection site are common, particularly in the first few weeks. These reactions usually settle within a day or two. The NHS semaglutide medicines page lists the full side-effect profile for reference, including which symptoms need prompt medical attention.

Persistent swelling, significant pain, or any sign of infection (warmth, spreading redness, discharge) should be assessed by a clinician promptly. The broader gastrointestinal side effects of semaglutide (nausea, loose stools, indigestion) are unrelated to injection site and are covered separately in the Wegovy overview. If you are unsure whether what you are experiencing is normal, the aftercare team at a regulated pharmacy is a good first call, ours is available seven days a week.

One more thing worth knowing: if your pen has been stored outside the fridge for a period, absorption can be affected before you even reach the injection stage. The guide to semaglutide storage and stability explains what the leaflet means by the room-temperature window, and when a pen should not be used.

If you are still deciding whether Wegovy is right for you, or would like to speak with a prescriber about your specific situation, you can start a free consultation with our clinical team at any time.