Choosing the Right Injection Spots for Wegovy

The abdomen: the most accessible site for most people

For the majority of people, the belly is the easiest place to start. The target area is the soft tissue around the navel, roughly a hand's width to the left or right, avoiding a two-centimetre radius directly around the navel itself. The skin here pinches easily, the layer of subcutaneous fat is usually consistent, and you can see exactly what you are doing.

Within the abdomen, think in sections rather than a single point. Divide the area into an invisible grid and move one section along each week. A quick check before injecting (run a finger across the candidate spot and feel for any firmness or tenderness) takes under a minute and tells you whether the tissue has recovered from the previous dose. If it hasn't, move further across. Specific spot selection within the abdomen is covered in more detail if you want a closer look at mapping the grid.

One thing our prescribers are asked most weeks: does it matter which side? It does not, clinically. Left and right are equivalent. What matters is that you are not landing in the same centimetre twice in a row. The NHS patient information for semaglutide confirms abdomen, thigh, and upper arm as the three approved sites and notes that the injection should go into the fatty tissue just under the skin, not into muscle.

Thigh and upper arm: when to use them and how

The outer thigh is the second site most people feel comfortable reaching. Sit down, relax the leg, and aim for the fleshy outer portion of the upper thigh, not the inner thigh, not the knee area. The muscle is closer to the surface here than at the abdomen, so a pinch-up technique matters more. Pinch a fold of skin, insert at the angle described in your leaflet, and release the fold before activating the pen.

The upper arm is the trickiest to self-administer because reaching the outer, fleshy part of the arm without twisting awkwardly takes practice. Many people find it easier with help from a partner. If you are self-injecting at the arm, a mirror or sitting position that keeps your arm relaxed (rather than tensed) helps considerably. The step-by-step guide to the Wegovy injection technique covers needle angle and pen activation in more depth.

One practical note: if you are also taking blood-glucose monitoring injections or insulin at the thigh, coordinate with your prescriber to avoid overloading a single site. Mixing uses of the same patch of tissue can slow healing and change absorption rates.

Rotation: the habit that protects your tissue over the long term

Lipohypertrophy (that lumpy, hardened fatty tissue that develops when the same spot takes repeated injections) is the main risk of poor rotation. It is not dangerous in the way a serious side effect is, but medicine absorbed through scar tissue behaves unpredictably, and persistent lumps can become uncomfortable. The fix is simple: never use the same site two weeks running.

A rotation plan does not need to be elaborate. Some people keep a paper note on the fridge. Others photograph the site after each injection with their phone. Whatever the system, the key is consistency across weeks, not perfection at a single injection. Alternating abdomen one week, thigh the next, then perhaps the upper arm, then back to the other side of the abdomen covers the ground well without requiring exact mathematical tracking.

If you notice persistent soreness, visible changes to the skin texture, or a lump that is not fading, tell your prescriber at the next review. Harder lumps that do not resolve in a fortnight are worth flagging sooner. Finding the best spot for your Wegovy injection has further guidance on recognising and managing site reactions early.

For safe disposal after each use, a 1-litre sharps container keeps used pens contained and away from household waste, your local council or pharmacy will accept it for collection.

What affects which site suits you

Body composition, mobility, and personal preference all factor in. People with a higher proportion of central body fat often find the abdomen straightforward from the outset. Those who are very lean may find the thigh or upper arm offers a more comfortable pinch. There is no clinically superior site in terms of weight-loss outcomes (the medicine works the same from all three) so this is genuinely a practical, personal decision.

Mobility also matters. If reaching the abdomen is difficult because of a recent surgery, joint pain, or dexterity issues, the thigh is often the easier alternative. The pre-filled Wegovy pen is designed to make self-administration straightforward for most adults, with a covered needle and a mechanism that activates on press, but if you are ever unsure about your technique, ask your prescriber or the aftercare team to walk through it with you.

Semaglutide (Wegovy) is licensed for weight management in adults with a BMI of 30 or above, or from 27 with at least one weight-related condition, as the full Wegovy overview explains. Oral contraceptive users should note that GLP-1 injections generally do not carry the same absorption-interaction warning as tirzepatide, though any questions about your specific situation are best put to your prescriber. If you want to understand how Wegovy fits into the broader picture of available treatments, the weight-loss treatment overview lays out the options clearly. And if cost is part of the decision, current Wegovy pricing context is worth reading before you commit.

When you are ready to find out whether Wegovy is clinically appropriate for you, our prescribers review consultations the same day. Check your eligibility with a free consultation.