How does mesotherapy work?

Mesotherapy involves delivering small amounts of substances through a series of small injections into or beneath the skin . Depending on the purpose of the procedure, these may include hyaluronic acid, vitamins, minerals, amino acids and other ingredients.

The treatment can be used on different parts of the face and body, including the neck. Some patients choose mesotherapy for skin rejuvenation, hydration and to improve skin texture, skin quality or overall appearance. It may also be used to target concerns such as dark circles, cellulite, fat reduction, hair loss or thinning hair.

Before treatment begins, a topical numbing cream may be applied to make the injections more comfortable. The practitioner then delivers the selected substances across the targeted area using a series of fine injections.

Mesotherapy is often promoted as a treatment with minimal downtime, although temporary redness, swelling and small bumps can occur. The reaction after a first session can help indicate how an individual patient's skin responds to the procedure.

Some treatment plans involve multiple sessions, with the number and spacing determined by the concern being treated and the patient's response. Any further treatment should only take place once the practitioner is satisfied that the skin has recovered appropriately.

Why can small lumps form after mesotherapy?

Small raised areas can appear where fluid has been delivered into the skin.

This can be part of the body's natural response to the injections. Mild mesotherapy swelling, tenderness and redness may also develop around the treated area during the early stages of recovery.

These changes should generally become less noticeable as the skin settles.

How long should temporary lumps and swelling last?

Minor bumps may settle within approximately 24 to 72 hours after a mesotherapy session. Mild redness and swelling can also be normal during this early stage of recovery and should gradually improve.

There is no single mesotherapy recovery time that applies to everyone. The answer depends on individual factors such as the number of injections, treatment area, skin type, substances injected, technique used and the patient's individual healing response.

People with sensitive skin may notice a stronger initial reaction. However, the treated area should generally become less swollen and uncomfortable as recovery progresses rather than become increasingly painful or inflamed.

Mesotherapy is often used to improve skin appearance, hydration and texture, so persistent or worsening symptoms may need further assessment.

If a lump is still noticeable after two weeks, becomes firmer or more painful, or is accompanied by worsening redness or swelling, it should be assessed by the practitioner or another healthcare professional.

When should lumps become a cause for concern?

Persistent lumps do not automatically mean something has gone wrong. However, a lump that becomes harder, larger or more painful should be medically assessed.

Early signs that may justify further attention include:

• Lumps that increase in size instead of gradually reducing
• Firm or hard nodules that do not soften
• Increasing or severe pain
• Redness or swelling that continues to worsen
• Skin that feels unusually hot
• Pus or other discharge from an injection site
• Changes in skin colour or appearance
• Feeling feverish or generally unwell

The NHS guidance on skin abscesses advises seeking medical help for lumps that are painful, red or hot, are becoming larger or remain present.

What are mesotherapy nodules?

Mesotherapy nodules are firmer, more persistent lumps that form within or beneath the skin after treatment.

They are different from the small bumps that may appear immediately after superficial injections. Nodules can sometimes be linked to prolonged inflammation, infection or a reaction to one of the substances delivered during treatment.

Persistent nodules should be assessed by a healthcare professional rather than squeezed, massaged aggressively or treated at home without medical advice.

Can infection cause persistent nodules?

Yes. Infection can lead to painful, inflamed lumps following mesotherapy.

A published systematic review of infections associated with mesotherapy identified cases of non-tuberculous mycobacterial infection following injections, which can cause localised skin lesions and may require prolonged treatment.

Infection is a potential risk of procedures involving injections and does not automatically prove negligence.

However, concerns may arise if contaminated products were used, infection-control standards were not followed or signs of infection were identified but not properly acted upon.

Can an allergic reaction cause lumps?

An allergic reaction to an injected substance can also cause swelling, redness, itching or localised inflammation.

Mesotherapy solutions may contain hyaluronic acid, vitamins, minerals, amino acids or plant extracts. Because formulations vary, the practitioner should know what is being used and consider whether the patient has a history of allergies or previous reactions.

In some cases, the immune system can also respond to an injected substance by forming persistent inflammatory nodules.

Can poor injection technique cause lasting lumps?

Technique can influence how substances are distributed through the skin.

Inappropriate injection depth, uneven placement or excessive product in one area may contribute to localised swelling, pooling or inflammation. Persistent lumps may therefore need further investigation if there are concerns about how the procedure was performed.

Independent medical evidence may be required to establish whether the technique used fell below the standard expected of a competent practitioner.

Who may be at higher risk of complications?

A consultation should take place before treatment so the practitioner can assess the patient's medical history, skin health and suitability for the procedure.

Factors that may need additional consideration include:

• Sensitive skin
• Existing skin infection
• Previous allergic reactions
• Relevant medical conditions
• Medicines that may affect healing
• Previous problems following injectable treatments

The consultation should also cover the potential risks, realistic outcome and whether an alternative treatment may be more suitable.

What should you do if lumps do not settle?

Contact the practitioner or clinic if lumps remain noticeable, become painful or do not appear to be improving.

Do not squeeze, puncture or attempt to drain a lump yourself. If symptoms are worsening or there are signs of infection, seek medical advice from a GP or NHS 111.

It can also help to keep:

• Dated photographs showing changes in the treatment area
• Details of when symptoms first appeared
• Treatment and consultation records
• Information about the substances injected
• Messages exchanged with the practitioner or clinic
• Records of further medical treatment

These documents may help establish what happened if the outcome later needs to be investigated.

When can lasting lumps after mesotherapy amount to negligence?

A poor result or persistent lump does not automatically establish negligence. A claim generally requires evidence that the practitioner failed to meet their duty of care and that this caused avoidable harm.

Before treatment

The practitioner should assess whether the patient is suitable for mesotherapy.

This should include considering relevant medical history, skin type, previous reactions and potential risks. They should also explain realistic outcomes and reasonable alternatives.

During treatment

The procedure should be performed to the expected professional standard using suitable products and an appropriate injection technique.

If inappropriate substances, incorrect placement or poor technique causes avoidable injury, this may be relevant to a negligence claim.

After treatment

Patients should receive clear aftercare advice and information about what to expect during recovery.

If a patient reports worsening pain, persistent swelling or possible infection, the practitioner should assess the problem and take appropriate action or recommend further medical care.

What evidence can support a mesotherapy negligence claim?

Evidence can help establish how the treatment was performed and whether the care received met the expected standard.

Relevant evidence may include:

• Consultation and consent documents
• Medical and treatment records
• Details of the injected substances
• Dated photographs
• Correspondence with the clinic
• Records of corrective treatment
• Independent medical evidence

Our cosmetic surgery claims process explains how evidence is gathered and assessed when investigating a potential claim.