In short. Groups who should not be treated, and why each one is excluded. Pregnancy, autoimmune disease, active infection, and the medicines that change the decision.
Key points
- Pregnancy or breastfeeding, any autoimmune condition and how active it is, any medicine you take including anything affecting clotting or immunity, any previous reaction to an injected substance, and any planned dental or surgical procedure in the same area.
- Each of these changes the answer, and none of them is a detail.
Some groups should not be treated with an injected mixture, and the reason is usually that the uncertainty cannot be managed rather than that a specific harm is known. Where a product is standardised, its behaviour in a particular group may have been studied. Where the mixture differs between clinics, there is nothing to study.
Pregnancy and breastfeeding
Nothing in a prepared mixture has been assessed for use in pregnancy or during breastfeeding, and there is no way for a clinician to reason about the risk of a combination that has never been characterised. The position is not that a harm has been shown; it is that nothing is known, and a treatment that is not urgent should not be given while the question is open. Waiting is the ordinary advice.
Active infection, broken skin and inflammation
Injecting through skin that is inflamed, broken or infected risks carrying that infection deeper, and it makes the area impossible to assess afterwards. A cold sore, an inflamed follicle, active acne or a wound that has not healed are all reasons to defer a session rather than to work around it. The same applies to an infection elsewhere with a fever, since the treatment is elective and can wait.
What to declare before anything is planned
Pregnancy or breastfeeding, any autoimmune condition and how active it is, any medicine you take including anything affecting clotting or immunity, any previous reaction to an injected substance, and any planned dental or surgical procedure in the same area. Each of these changes the answer, and none of them is a detail.
Autoimmune and immune-mediated conditions
Where the immune system is involved in a condition, introducing several unfamiliar substances into the skin is a decision for the clinician who manages that condition rather than a routine one. The deciding factors include which condition, how active it is and what treatment you take. A clinic that treats this as a formality has not understood the question.
Bleeding, clotting and medicines
Medication that affects clotting increases bruising and the rare risk of a collection of blood, and some medicines interact with ingredients that may be included for a local effect. A bleeding disorder is a reason for a considered decision rather than an automatic exclusion, and it belongs in the assessment rather than in a form. The same is true of poor healing or a tendency to form raised scars.
These are reasons to wait rather than to adjust the plan
- Pregnant or breastfeeding, or a pregnancy being planned in the next few months.
- An infection, cold sore, rash or unhealed wound at or near the area.
- An autoimmune condition being assessed, or a change in the medicines for it.
What the risks of a mixture are once those exclusions have been considered is set out in Infection, Allergy and Nodules, and the case for not treating at all is made in When the Honest Answer Is That You Do Not Need This.
Frequently asked questions
Why is pregnancy an exclusion rather than a precaution?
Because the mixture is not standardised and nothing has been assessed for use in pregnancy, so there is no way to reason about the risk. The uncertainty is not about one ingredient that has been studied and found wanting, it is about a combination whose behaviour in pregnancy nobody has examined. Waiting is the only defensible position.
Does an autoimmune condition rule the treatment out completely?
It makes it a specialist decision rather than a routine one. Some conditions and some treatments affect the answer and others do not, and the deciding factors include which condition, how active it is and what else you take. That judgement belongs to the clinician treating the condition, and it should be made before an injectable is planned rather than after.
What counts as an active infection at the treatment site?
Anything that has broken the skin or inflamed it: a cold sore, an infected hair follicle, acne that is inflamed, a rash, or a wound that has not healed. Injecting through inflamed or broken skin risks carrying infection deeper, and a session is usually deferred until the area has settled rather than adjusted around it.
Risks & Limitations
- Mesotherapy names a technique, not a product. The mixture is often prepared rather than manufactured, and it has not been assessed as a mixture.
- Any change reported is usually modest, lies in surface quality rather than in volume, and fades without further sessions.
- Firm lumps and delayed reactions can appear weeks to months after a session, and the date they appear is part of how they are assessed.
- A mixture is not standardised between clinics or between sessions, so the evidence for one plan says nothing about the next.
When to Seek Care
- Severe pain out of proportion to the procedure, or skin turning white, grey, mottled or dusky, needs immediate assessment.
- Any change in vision after an injection requires emergency care.
- Fever, or redness, warmth or discharge at a treated area that is spreading rather than settling.
- A firm lump or nodule appearing weeks or months later, which should be reported when noticed rather than at a review.
References & Further Reading
- American Society of Plastic Surgeons (ASPS) — procedure and safety guidance
- National Institute for Health and Care Excellence (NICE, UK) — relevant guidance
- Cochrane Library — systematic reviews
- Chinese Medical Association Plastic Surgery Branch — clinical guidance
This page is patient education, not medical advice, and it does not cite individual studies. Discuss your own case with a qualified clinician. To arrange an assessment at Chongqing West District Hospital, see Contact & Consultation.