Wegovy in the leg or stomach: choosing your injection site

The case for the stomach

The abdomen is the site most people try first, and there are practical reasons for that. Fatty tissue around the stomach tends to be accessible regardless of body composition, and it's easy to see exactly where you're placing the pen. The main guidance is to stay at least two to three centimetres away from the navel and to avoid any area that is bruised, scarred, or currently irritated. You'll find full technique detail in the Patient Information Leaflet that comes with your pen, and the NHS semaglutide page is a useful plain-language reference alongside it.

One thing worth knowing: if you're also taking oral contraceptives, tirzepatide (not semaglutide) is the medicine that may affect pill absorption during the early weeks of treatment. For semaglutide the NHS England clinical guidance does not flag the same concern, so that particular consideration doesn't change your site choice here. If you'd like more detail on comparing the stomach and thigh specifically, that page goes into the practical differences.

Some people find the abdomen more comfortable simply because they can watch what they're doing. Others find it the trickiest spot psychologically, if you're new to self-injecting, that's entirely normal, and it usually gets easier after the first couple of pens.

The case for the thigh

The front of the thigh is a straightforward alternative when the stomach feels awkward, or when you're building rotation into your weekly routine. The outer, middle portion of the thigh (roughly the area you'd touch if you pressed your hands flat against your legs) has enough subcutaneous tissue for a reliable injection. Avoid the inner thigh, where skin is thinner, and the knee area.

Practical rotation matters more than which site you use. Staying at the same spot week after week can lead to lipohypertrophy, a build-up of fatty, fibrous tissue under the skin that looks and feels like a small lump. When that happens, absorption can become less predictable. So if you've been injecting into the stomach consistently, switching to the thigh for a week or two gives the abdomen time to recover. You can read more about the specific experience of injecting Wegovy in the leg if you'd like site-specific guidance.

Sitting down with the muscle relaxed makes the thigh injection easier for most people. The pen doesn't need to be pressed in hard, it's designed to deliver the dose through normal skin contact with the activation button held down until the injection is complete.

What rotation actually means in practice

Rotation isn't complicated, but it's worth being deliberate about it. The principle is simple: each weekly injection goes somewhere different from where you injected the week before. That means rotating between sites (abdomen one week, thigh the next, upper arm if someone can help) and also moving within a site, a few centimetres along, not the exact same pinch of skin.

Some people find a simple system helpful: a small note in their phone's calendar, or using different sides of the body on alternating weeks. The upper arm is the third licensed site, though it typically requires someone else to administer the injection, so it tends to suit people who have a regular helper at home.

Injection-site reactions are listed among the common side effects of Wegovy in the Wegovy SmPC on the eMC. Redness, itching, or a small raised area after injection usually resolves within a day or two and is not a reason to stop treatment, but anything that worsens, spreads, or doesn't settle should be discussed with your prescriber or nurse. The stomach injection guide goes into site-specific aftercare if you'd like more on managing local reactions at the abdomen.

When to involve your prescriber or clinical team

If you've noticed ongoing discomfort at every site you try, visible changes to the skin that aren't settling, or you're simply not confident about your technique, those are all worth raising. It's a question our prescribers hear regularly, there's nothing unusual about it. Separately, some people experience stomach pain or nausea in the days after their injection; that's a gastrointestinal effect of the medicine itself rather than a site issue, and this page on Wegovy stomach pain covers what's typical and what warrants medical attention.

If you're experiencing something more generalised (fatigue, nausea, digestive upset) that reads more like a flu-like reaction in the early weeks, it's worth reading about Wegovy and stomach flu-like symptoms to understand what's expected versus what isn't. Severe or persistent abdominal pain that radiates to the back is a symptom to treat seriously: seek urgent medical help, as the MHRA has highlighted acute pancreatitis as an infrequent but serious side effect of GLP-1 medicines.

If you'd like to understand the full picture of what semaglutide is and how it works before going further, that's a good place to start. And when you're ready to explore treatment, you can find out about the process through our free consultation, a GPhC-registered prescriber, not an algorithm, reads your details and reviews your suitability the same day.