Wegovy helps you lose weight, but did you know about this symptom?

“An unexpected side effect of ‘stinging skin’ during Wegovy treatment? We’ve organized the symptoms caused by an antibody response and how to address them based on real clinical cases from medical staff.”

Wegovy is currently one of the most closely watched drugs in the domestic obesity treatment market. As a GLP-1 analog, it has excellent appetite-suppressing and satiety-inducing effects, so many people are actually experiencing weight loss.

However, recently, some patients who used Wegovy have reported a lesser-known

side effect. That is the symptom of ‘stinging skin.’

🩺 Skin that hurts even when lightly touched, not just simple pain

After using high-dose Wegovy for a certain period, some patients experience chills similar to a cold or body ache, along with stinging pain in the skin.

This feels different from ordinary muscle pain, and many patients report pain even from the slightest touch on the skin.

📌 Onset timing: usually after Wegovy 1.7 mg or 2.4 mg administration

📌 Duration: symptoms generally improve within about 3 months on average

📌 Symptom characteristics: chills similar to a cold, stinging sensations, skin pain, and more

🔬 Why does this happen? Because of an antigen-antibody reaction!

Eli Lilly, the developer of Mounjaro, has stated that the symptoms are caused by a type of immune reaction (an antigen-antibody reaction).

In fact, when the serum of some patients was analyzed, antibodies were found to have formed.

This can be understood as a mechanism similar to how, if antibodies form after Botox treatment, the effect may decrease, but there is an important difference.

▶ Even if Wegovy antibodies form, there is no major impact on weight-loss effectiveness.

▶ In fact, there are research findings showing that some groups with antibodies lost even more weight.

🧪 Real case: a patient who experienced symptoms after using high-dose Wegovy

Dr. Jo Jeong-hun, the CEO and head doctor of Bliss Clinic, also personally used high-dose Wegovy and experienced the stinging-skin symptom.

Afterward, the symptoms naturally eased through dose adjustment and changes in the treatment period, and this case is now becoming an important reference point in managing side effects for current Wegovy users.

Jo Jeong-hun, CEO and head doctor of Bliss Clinic

💡 If you have these symptoms

• During Wegovy treatment, your skin feels stinging, and you feel pain even from light contact

• Chills or cold-like body-ache symptoms continue

• You have unusual pain even though no other disease is suspected

➡ In such cases, you should consider the possibility of a temporary reaction caused by Wegovy rather than another cause.

In most cases, symptoms improve over time, and if they are severe, dose adjustment or a treatment break may be needed.

✔ Closing advice

Wegovy is certainly an excellent weight-loss treatment. However, no matter how good a medication is, it cannot be used without being prepared for unexpected side effects.

The stinging-skin symptom is rare, but it is a sufficiently possible immune reaction. If it occurs, do not panic and it is important to seek advice from a professional.

Bliss Clinic is accumulating know-how in responding to side effects based on Wegovy treatment experience and real cases, and we help support safe and sustainable weight loss through personalized treatment plans.