Wegovy injection sites: choosing where to inject and rotating correctly

Your pen is in your hand for the first time, here is where to put it

Most people starting Wegovy reach for the abdomen, and that makes practical sense. There is usually more subcutaneous tissue there, the area is easy to see, and you can pinch a fold of skin comfortably. Aim for a spot at least two inches (5 cm) away from the navel, avoid injecting directly into or immediately around it. The skin around old scars or stretch marks is best avoided too, partly because the tissue structure is different and partly because absorption may be unpredictable there.

If the abdomen feels uncomfortable or you simply prefer a different option, the front of the thigh is a straightforward alternative. Sit with your leg relaxed, inject into the middle third of the outer front surface, not the inner thigh and not right on the kneecap side. The upper outer arm works well if someone else is administering the injection, though self-injecting there is possible with practice.

None of the three sites is clinically superior to the others in terms of how well semaglutide is absorbed. Choice often comes down to what you find easiest to pinch and to see. The detailed guidance on Wegovy administration sites walks through the practical steps for each location if you want a closer look before you start.

Rotation: the rule that most people skip and later regret

Injecting into the same patch of skin week after week is the single most common technique mistake. The result is lipohypertrophy, a lump of thickened, fatty tissue that forms because the area has been repeatedly traumatised. Injecting into these lumps is uncomfortable, and the medicine may not absorb properly from them, which can affect how well the treatment works.

The practical fix is straightforward: move at least 1–2 cm from last week's exact spot within the same broad area, and cycle through the sites over several weeks. A simple mental map works for most people, divide the abdomen into a clock face and work around it, or alternate left thigh, right thigh, abdomen in a pattern you can remember. Some people keep a brief note in their phone. Whichever system you choose, consistency matters more than sophistication.

If you ever notice stinging or discomfort that feels sharper than usual, the section covering Wegovy injection site stinging explains common causes and when it is worth flagging to a clinician.

What normal skin reactions look like, and what to report

A small amount of redness, mild itching, or a faint bruise around the injection point is common in the first few weeks and typically settles within a day or two. This is the skin responding to the needle and the injected fluid, not a sign that anything has gone wrong.

More persistent reactions are a different matter. Swelling that does not fade within a few days, a hard lump that grows rather than shrinks, skin that looks pitted or unusually pale, or any signs of infection (warmth, spreading redness, pus) should be reported to your prescriber or pharmacist promptly. Continuing to inject into compromised skin makes the problem worse, so switch to a different site immediately and get the affected area reviewed.

Allergic reactions to Wegovy are uncommon but possible, if you experience a rash, difficulty breathing, or swelling of the face or throat after an injection, seek emergency help. The NHS semaglutide page lists the full range of side effects worth knowing about. Any suspected adverse reaction can also be reported through the MHRA Yellow Card scheme, which helps regulators track safety signals across all medicines.

A few practical details that catch people out

Wegovy pens are stored in the fridge (2–8°C). Injecting cold semaglutide straight from the fridge can sting more than it needs to, letting the pen sit at room temperature for around 30 minutes before you use it is a small thing that makes a noticeable difference. Check the Patient Information Leaflet inside your pack for the exact room-temperature window allowed, because that window is specific to the product and matters for storage safety.

Timing your weekly injection on the same day each week keeps the dosing schedule consistent. A lot of people quietly anchor it to something they will not forget, Sunday evening, payday, the start of the working week. The day itself does not have a clinical preference; the gap between injections staying close to seven days is what counts. If you are travelling across time zones or have an unusual week, your prescriber can advise.

Wegovy is a prescription medicine for weight management, licensed for adults with a BMI of 30 or above, or 27 or above alongside a weight-related health condition. If you are exploring whether it could be right for you, the Wegovy treatment overview covers eligibility, how the medicine works, and what clinical trials showed about average weight reduction. For a broader look at weight-loss treatment options, the weight-loss page compares the approaches available through nume. Cost is a real consideration for most people, and our Wegovy cost context page explains how UK private pricing works and what a legitimate price should include, while the Wegovy comparison site sets out how different providers stack up so you can make a more informed choice. If you would like to read more about the active ingredient itself before committing, our semaglutide website goes into detail about how the medicine works and what the evidence says.

When you are ready to talk through whether Wegovy is appropriate for your situation, speak to our prescribers via a free consultation. A GPhC-registered Independent Prescriber reviews every application the same day, not software, a real clinician who reads your answers before any treatment is considered.