Semaglutide injection places: choosing where to inject Wegovy

You've just taken the pen out of the fridge, here's what happens next

Most people's first instinct is to inject wherever feels easiest to reach, which usually means the abdomen. That instinct is actually sound: the belly is the most commonly used site in clinical practice, offering a broad, accessible area and consistent subcutaneous depth for most adults. The key constraint is the navel, stay at least 5 cm away from it in any direction, and avoid any area that feels hard, bruised, or scarred. A soft pinch of skin a little to one side of centre works well for most people.

What catches many people off guard is the temperature. A pen that has been sitting in the fridge door will be noticeably colder than body temperature, and that contrast is what causes the brief stinging sensation some people describe. Letting the pen sit at room temperature for around 30 minutes before injecting is a simple fix, but always check the Patient Information Leaflet for the exact guidance on how long Wegovy can safely be kept out of the fridge, because that window is specific to the product. The burning sensation some people notice with semaglutide injections has a few causes worth understanding if it's bothering you.

Once the pen is ready, clean the chosen site with a fresh alcohol swab and let it dry fully before you inject. A damp surface can sting. Then press the pen firmly against the skin and activate it according to the instructions in your leaflet, there's no need to pinch the skin tightly with most modern auto-injector pens. Hold it in place for the count specified in your leaflet to ensure the full dose delivers.

Thigh and upper arm: when the abdomen isn't the right choice

The front of the thigh is a good alternative and easy to self-inject, sit down, place the pen on the outer front section of your thigh (roughly midway between knee and hip), and avoid the inner thigh where the skin is thinner and more sensitive. This site works particularly well for people who find abdominal injections uncomfortable or who are carrying less abdominal fat. Guidance on the best places to inject semaglutide goes into the comparative pros and cons of each site in more detail.

The outer upper arm is the third licensed site but does require a bit more planning for self-injection, you can't easily see it and it's harder to hold steady without support. A partner or carer can administer it there straightforwardly. If you're injecting solo, a mirror and some practice finding a consistent spot on the outer, fleshier part of the arm (not near the shoulder joint, not near the inner arm) makes it manageable. Some people find a slight backward lean helps expose the right area.

One misconception worth setting aside gently: that injecting into a 'fleshier' part of the body automatically means a bigger dose effect. It doesn't. The licensed sites are chosen for their subcutaneous tissue depth and consistent absorption profile, not for proximity to fat stores. The medicine works systemically once absorbed, where exactly in the subcutaneous layer it enters doesn't change that. The detail on Wegovy injection sites covers the anatomy a little further if you'd like it.

Rotation: why it matters more than which site you pick

Rotation is arguably more important than the initial choice of site. Using the same small area repeatedly causes the skin and underlying tissue to become thickened and fibrous over time, a condition called lipohypertrophy, well-documented in people who inject regularly. Medicine absorbed through that altered tissue is less predictable. The practical upshot: vary both the site (abdomen one week, thigh the next, for example) and the precise spot within that site each time.

A simple system many people find helpful is to think of the abdomen as a clock face and move around it week by week. Others alternate left and right sides. The method matters less than the consistency of rotating. The broader semaglutide injections guide covers technique alongside site choice if you'd like both together. The Wegovy overview page is a good starting point if you're still deciding whether this is the right treatment for you. For anything about how your treatment is going or whether a site reaction looks unusual, your prescriber is the right person to ask, and if you're considering starting, speaking to our prescribers is a good first step. Our clinical team, led by our clinical lead, reviews every consultation personally.

If you're weighing up the costs involved in private treatment, the Wegovy cost page sets out what to expect from private prescriptions in the UK. The NHS tirzepatide and semaglutide medicines pages are the most reliable sources for injection technique alongside your own Patient Information Leaflet, the NHS semaglutide page includes patient-level guidance on how to use the pen correctly.