Where to inject Wegovy on your stomach: sites, spacing and technique

Step 1: finding the right zone on your abdomen

Sit or lie comfortably and locate your navel. Measure roughly five centimetres outward in any direction, that is the zone to avoid. Beyond that boundary, the lower abdomen offers a substantial area of subcutaneous (under-the-skin) fatty tissue that is well-suited to weekly injections. Think of a rough crescent that runs from below your lowest rib down to just above the waistband, staying well clear of the bony structures at your hips.

A quick check that takes under a minute: pinch the skin gently between thumb and forefinger at your chosen spot. If you can hold a soft fold of at least two to three centimetres, there is enough tissue for a comfortable subcutaneous injection. If the skin feels tight or you can feel muscle underneath, move outward slightly. This pinch test is the same one used in clinical training, and it works.

The full technique for injecting Wegovy in the stomach covers what to do once you have found your spot, needle angle, how long to hold the pen in place, and how to confirm the dose has been delivered. Your Patient Information Leaflet is the definitive reference for each of these steps; the NHS semaglutide medicines page also has a plain-English overview of the injection process.

Step 2: rotating your stomach sites each week

Using the same patch of skin every week leads to lumps of thickened fatty tissue forming under the surface. The medical term is lipodystrophy, and once it develops, the medicine absorbs less reliably from that site, which can affect how the treatment works over time. Rotating solves this entirely.

A practical system: divide your usable stomach area into four rough quadrants (upper left, upper right, lower left, lower right). Move one quadrant along each week, returning to the starting point after four weeks. That gives each area three weeks to recover fully before the next injection. Some people prefer a clockwise drift around the navel rather than quadrants, the approach matters less than the principle of not returning to an identical spot for at least a month.

If you have been using a single patch for several weeks and notice a firm lump under the skin that does not resolve, flag it with your prescriber before your next injection. The detailed guide to injecting Wegovy in the stomach includes more on why rotation matters and how to adapt your routine if a site is sore.

Step 3: managing skin reactions and knowing when to act

Mild reactions at the injection site (a small red mark, faint bruising, temporary itching) are listed as common in the Wegovy clinical trial programme and usually settle within a day or two. If you would find it helpful to see the process in action, our video showing how to inject the Wegovy pen in the stomach walks through each stage so you can check your own technique against a visual reference. Injecting slowly, keeping the pen pressed against the skin for the full count before withdrawing, and letting the medicine reach room temperature for about half an hour before use all tend to reduce discomfort.

Some people find that cleaning the skin with an alcohol swab and letting it dry completely before injecting reduces stinging. If you use alcohol swabs, the drying step takes roughly thirty seconds and is worth not skipping.

Signs that warrant a call to your prescriber rather than waiting: a lump that stays firm for more than a couple of weeks, skin that darkens or dimples at the injection site, or a reaction that worsens rather than settles. An allergic reaction, which is rare, would typically involve swelling, redness spreading well beyond the injection point, or hives appearing elsewhere. Seek urgent medical help if that happens. You can also report unexpected reactions through the MHRA Yellow Card scheme, which helps regulators track how medicines perform in real-world use.

Step 4: the stomach versus other licensed sites

Wegovy is licensed for injection into the abdomen, the front of the thigh, or the outer area of the upper arm. The stomach is the site most people start with, because the subcutaneous layer there is generally easy to access and the tissue responds well to weekly injections. If you want a step-by-step walkthrough specific to this area, our guide on how to give a semaglutide injection in the stomach covers positioning, technique and what to expect at each stage. There is no clinical evidence that one site produces better results than another, absorption is broadly equivalent across all three.

If your stomach is uncomfortable after surgery, during pregnancy (Wegovy is not recommended during pregnancy, speak to your prescriber immediately if this applies to you), or if you simply find a different site easier to reach, the thigh and upper arm are both appropriate. The only rule is not to inject into the same site as another medicine on the same day. For a broader look at all licensed injection locations, the guide to where to inject Wegovy covers all three sites with practical notes on each.

Wegovy is a prescription semaglutide injection for weight management; for context on how it fits alongside other licensed options, our Wegovy overview page covers the clinical background, eligibility and what the treatment involves. If you are thinking about starting or have questions about whether the treatment is right for you, our prescribers can assess your situation, start your free consultation and a GPhC-registered prescriber, not an automated system, will review your answers the same day.