What Part of the Body Do You Inject Wegovy Into?

Which three sites does Wegovy go into, and where exactly within each?

The three areas approved for Wegovy injections are the abdomen, the thigh, and the upper arm. Within each, the aim is always the same: subcutaneous tissue, meaning the soft cushion of fat beneath the skin rather than muscle or vein.

For the abdomen, inject into the fatty area around the stomach, steering at least two inches clear of the navel. Most people find this the easiest site to reach themselves, and it offers a generous surface area to rotate around over successive weeks.

The front of the thigh is the middle section of the upper leg. Avoid the inner thigh, where the tissue is thinner and blood vessels sit closer to the surface. This site works well when you are sitting down, which helps the muscle relax.

The outer upper arm is the third option. For many people this is harder to self-inject cleanly at the correct angle; a household member or carer can help. If you want a fuller picture of the upper-arm technique specifically, our guide to injecting Wegovy in the arm covers it in detail. The golden rule across all three: you are aiming for fatty tissue, not muscle.

Does it matter which site you choose each week?

A question our prescribers hear most weeks is whether one site works better than the others. The short answer is that the absorption profile of semaglutide is broadly similar across all three licensed areas, so personal preference and ease of access are legitimate factors. What does matter is that you rotate.

Injecting the same spot repeatedly can cause lipohypertrophy, a localised thickening of fatty tissue that slows absorption and can make the medicine less effective over time. The practical approach is to pick a different region each week in a consistent pattern you can remember, and within that region, shift the exact spot by at least an inch each time.

You can read more about how frequently Wegovy is injected if you want to build the rotation schedule alongside your dosing calendar. Never inject into skin that is bruised, scarred, hardened, or shows signs of a previous reaction.

What if you inject into the wrong spot or use the wrong technique?

Getting the site or angle wrong occasionally is more common than most people admit, and the consequences vary. Injecting into muscle rather than fat can make the medicine absorb faster than intended and increase side-effect intensity. Missing the subcutaneous layer and staying too shallow means absorption may be incomplete.

Other signs that something went wrong include unusual pain at the site, bleeding beyond a small amount, or swelling that does not settle within a day. We've written a full explanation of what happens when Wegovy is injected incorrectly, including when to contact your prescriber. The key point: one imperfect injection is unlikely to cause serious harm, but a recurring technique issue is worth addressing with clinical support rather than guessing a fix.

If you want a step-by-step refresher on the whole process, our practical injection guide covers preparation, pinch technique, angle, and disposal. Proper disposal matters too; a sharps container is the safe and legal way to discard used needles at home.

Does site choice affect side effects or skin reactions?

Injection-site reactions (redness, mild bruising, itching) are listed in the NHS semaglutide guidance as common and generally short-lived. Consistent rotation across all three sites, and within each site, reduces their likelihood and severity.

Beyond local reactions, the systemic side effects of Wegovy (nausea, digestive discomfort, fatigue) are driven by the medicine's mechanism rather than where you inject. They tend to be most noticeable in the first weeks or after a dose increase, and they usually ease. If reactions at a particular site are persistent or troublesome, your prescriber can advise whether switching sites helps or whether something else is going on.

Thinking about a longer-term picture of how the medicine behaves? Understanding what happens when you stop Wegovy is worth reading alongside your injection routine. And if you'd like to understand how semaglutide compares to other approaches, our weight-loss treatment overview sets out the options clearly, including a closer look at how weight loss injections such as Ozempic fit into the picture.

Wegovy is a prescription-only medicine. If you have not yet spoken to a prescriber, or you're considering whether it might be right for you, start a free consultation with our clinical team to get an individual assessment.