Cellulite Changes: What Could Be Causing It

First: Cellulite Is Not Cellulitis

The names are similar, but the conditions are not.

Cellulite is a change in surface contour. It appears as shallow depressions, rippling, or an orange-peel texture, most commonly over the buttocks and thighs. It is highly prevalent after puberty and is not an infection [1][2].

Cellulitis is a bacterial infection in deeper layers of skin. CDC describes the affected area as painful, red, swollen, tender, and warm. Fever or chills can occur, and rapidly spreading redness needs immediate medical attention [7].

That distinction is the most important part of evaluating a new “cellulite change.” Long-standing symmetric dimples are usually cosmetic. A new hot, painful, red patch is not routine cellulite.

What Creates the Dimpled Surface?

Cellulite reflects an interaction among the dermis, subcutaneous fat, and fibrous connective-tissue septa that link skin to deeper fascia. Where a septum tethers the surface and adjacent tissue projects upward, a depression can become visible [1][4].

Imaging and anatomic studies support structural differences in the subcutaneous tissue of people with and without visible cellulite, but the old shorthand that women have only “vertical septa” and men have only a “crisscross pattern” is too simple. Sex-related anatomy, skin thickness, fat-compartment architecture, mechanical forces, and individual variation all contribute [3][6].

No validated blood test identifies the “cause” of ordinary cellulite. Grading scales can standardize photographs and clinical studies, but a change in grade does not reveal a specific hormone, gene, or circulation problem [4][5].

Why Cellulite Can Look Different From One Day to the Next

Before assuming the tissue changed, standardize the observation. Appearance can vary with:

• Direct versus side lighting.
• Standing versus lying down.
• Muscle contraction.
• Camera distance, focal length, and image sharpening.
• Hydration and short-term fluid shifts.
• Clothing pressure or recent massage.
• Time since exercise.

For a useful comparison, photograph the same area while standing relaxed, at the same distance and time of day, with the same neutral lighting. Compare over months, not hours.

If the change remains visible under standardized conditions, sort it into one of four patterns:

Weight Gain, Weight Loss, and Body Composition

Weight gain can make cellulite more visible by increasing the volume of subcutaneous fat compartments. Weight loss may reduce that volume, but it does not necessarily remove tethering septa. If skin laxity becomes more apparent, some dimples may look deeper even as total fat decreases [4][5].

There is no evidence-based rule that a two-point BMI change or a five-kilogram gain automatically advances cellulite by one grade. Changes in appearance should be assessed directly rather than predicted from those thresholds.

The same caution applies to GLP-1 medicines. Semaglutide and tirzepatide can produce substantial weight loss, and the STEP 1 trial found a mean 14.9% weight reduction with semaglutide 2.4 mg at 68 weeks [13]. That trial did not measure cellulite. It supports the magnitude of body-composition change, not a claim that semaglutide causes or cures dimpling.

Resistance training can improve strength, muscle contour, and body composition. It may change the background over which cellulite is seen, but current evidence does not support promising that a 12-week program will reduce the Nürnberger-Müller grade by an exact amount. Exercise is worthwhile for health and contour; it should not be sold as a guaranteed septa-removal treatment.

Aging, Skin Laxity, and Menopause

Skin changes with age. Collagen organization, elasticity, hydration, and thickness can all change, making underlying contour more visible. Cellulite reviews consistently include skin laxity and connective-tissue remodeling as contributors [4][5].

Menopause can coincide with changes in skin and body-fat distribution, but “estrogen decline is the single most influential cause of cellulite” is not established. Cellulite is not diagnosed with an estradiol test, and hormone therapy has not been proven in a large randomized trial as a cellulite treatment.

Pregnancy, contraception, and polycystic ovary syndrome may coincide with changes in weight, fluid balance, and fat distribution. That does not justify attributing a new dimple to one hormone or recommending a medication change without evaluating the full clinical context.

The previous article also stated that collagen production begins falling at exactly age 25, that skin loses exactly 2% of collagen annually for five years after menopause, and that a particular collagen-type ratio explains cellulite. Those statements combine older skin-aging observations with a cellulite conclusion the cited studies did not directly test.

Genetics and Family Pattern

Cellulite often runs in families, and inherited anatomy likely contributes. The measurable features may include skin properties, fat distribution, and septal architecture [3][6].

The available literature does not support telling a person that genetics account for exactly 55% to 60% of their cellulite. Nor does an ACE insertion/deletion variant serve as a clinical cellulite test. A study linking that variant to serum angiotensin-converting-enzyme levels does not establish that it predicts dimpling.

Family history is useful descriptive context. It is not a diagnosis and does not make progression inevitable.

Lipedema: Painful, Disproportionate Tissue Is Different

Lipedema is not simply severe cellulite. A U.S. consensus document describes disproportionate nodular and fibrotic adipose tissue, predominantly in women, often involving the hips and limbs. Pain, easy bruising, heaviness, and reduced mobility can occur [10].

Features that support a lipedema assessment include:

• Symmetric enlargement of the legs or arms that is disproportionate to the trunk.
• Tender or painful tissue.
• Easy bruising.
• Nodular or fibrotic tissue.
• A cuff-like transition near the ankle or wrist.
• Limited change in the affected tissue despite overall weight loss.

Lipedema, obesity, venous disease, and lymphedema can coexist. A photograph or a cellulite grade is not enough to separate them.

Lymphedema and Persistent Swelling

Lymphedema involves impaired lymph transport and persistent tissue swelling. Early swelling may pit with pressure; later disease can become firm or fibrotic. It may follow lymph-node surgery or radiation, infection, trauma, or congenital lymphatic disease [11].

The 2023 International Society of Lymphology consensus emphasizes clinical assessment while acknowledging gaps in high-quality evidence. Limb measurements, ultrasound, lymphoscintigraphy, bioimpedance, or other imaging may be used depending on the presentation and diagnostic uncertainty [11][12].

New persistent swelling should not be labeled “fluid cellulite” without evaluation. Compression and decongestive therapy may be appropriate for confirmed edema disorders, but cosmetic massage does not diagnose or treat every cause of swelling.

Venous Disease and Deep Vein Thrombosis

Chronic venous insufficiency can cause lower-leg swelling, heaviness, aching, skin discoloration, and, over time, firm inflammatory skin change. Duplex ultrasound with reflux testing can help evaluate chronic bilateral edema when venous disease is suspected [9].

Acute one-sided swelling has a different urgency. CDC lists swelling, pain or tenderness, warmth, and redness or discoloration as common DVT symptoms. About half of people with DVT have no symptoms, so visual appearance alone cannot exclude it [8].

Seek prompt medical assessment for new unilateral swelling or pain, especially after surgery, immobilization, long travel, pregnancy, estrogen exposure, cancer treatment, or a previous clot. New shortness of breath, chest pain, coughing blood, fainting, or a fast or irregular heartbeat can signal pulmonary embolism and requires emergency care [8].

Do not start compression stockings solely because an area looks more dimpled. Compression can be useful for some diagnosed venous or lymphatic conditions, but acute DVT and arterial circulation concerns need appropriate evaluation first.

Steroids, Cushing Syndrome, and Other Medical Clues

Long-term systemic glucocorticoids can thin skin, cause easy bruising, create wide purple stretch marks, weaken muscle, and redistribute body fat. Endogenous Cushing syndrome can produce a similar cluster [22].

The visual change is not specific to cellulite. Evaluation is more important when new dimpling or laxity occurs alongside:

• Rapid central weight gain.
• Wide purple stretch marks.
• Easy bruising.
• Proximal muscle weakness.
• New diabetes or difficult-to-control blood pressure.
• A rounded face or increased fat at the upper back.
• Months of oral or injected glucocorticoid exposure.

Do not stop prescribed steroids abruptly. The relevant next step is medication review and, when the symptom pattern fits, clinician-directed endocrine testing.

What Treatments Have Real Evidence?

No intervention has emerged as a permanent, universal cellulite cure. A 2024 systematic review found 24 randomized trials across mechanical stimulation, topical therapy, shock-wave therapy, lasers, radiofrequency, injectable treatment, and ultrasound. The review found promising results for shock-wave therapy, radiofrequency, and collagenase, while grading the overall evidence as moderate and noting very short and heterogeneous follow-up [17].

That evidence supports a mechanism-based discussion, not a “best treatment” ranking for every person.

Targeted Septa Release and Subcision

Subcision procedures aim to release the fibrous bands associated with discrete depressions. A multicenter single-arm study of targeted verifiable subcision reported mean Cellulite Severity Scale improvement maintained through 12 months, with mostly mild adverse events [18].

Single-arm device studies can show durability within the treated group, but they cannot fully separate treatment effect from participant selection, photography, expectation, and other biases. Ask who performed the procedure, what device was used, how complications are managed, and whether the published population resembles you.

Acoustic and Shock-Wave Approaches

Small randomized trials have reported improvement with focused shock-wave therapy compared with sham treatment [21]. A separate multicenter prospective study of rapid acoustic pulse treatment reported improvement at more than 52 weeks in 42 participants [19].

These are encouraging signals, not proof that every acoustic device or spa protocol works. Energy settings, targeting, number of sessions, operator training, outcome scales, and follow-up differ substantially.

Radiofrequency

Radiofrequency devices heat tissue with the aim of changing collagen and contour. A randomized split-thigh study found modest improvements, but it included only 10 participants [20]. Newer devices may combine radiofrequency with vacuum, massage, ultrasound, or microneedles, so results from one platform should not be transferred automatically to another.

Creams, Massage, and Supplements

Topical products may temporarily change hydration or surface appearance. Massage can temporarily move fluid and alter how the skin looks. Neither approach has been shown to permanently release fibrous septa.

Evidence for supplements is weaker. Be cautious with products that promise lymph “detoxification,” hormone balancing, collagen rebuilding, or permanent fat-cell removal based only on before-and-after photos.

What Happened to Qwo?

FDA approved Qwo (collagenase clostridium histolyticum-aaes) in 2020 for moderate-to-severe buttock cellulite in adult women. Its label warned about hypersensitivity and frequent injection-site bruising; common reactions also included pain, nodules, itching, redness, discoloration, swelling, and warmth [14].

The two phase 3 RELEASE trials found statistically significant improvement compared with placebo [15]. However, the manufacturer announced in December 2022 that it would cease production and sale because of market concerns about the extent and variability of bruising and possible prolonged skin discoloration [16].

The accurate 2026 description is therefore not “Qwo was never approved” and not “Qwo is a readily available current option.” It has an FDA approval history and efficacy data, but routine commercial production and sale stopped.

When a Change Needs Medical Attention

Arrange prompt evaluation when a change is:

• New and one-sided.
• Painful, tender, hot, or red.
• Associated with persistent swelling.
• Expanding quickly.
• Accompanied by fever or chills.
• Associated with a wound, bite, ulcer, or recent procedure.
• Accompanied by easy bruising and painful disproportionate limb tissue.
• Paired with marked steroid-like changes such as purple stretch marks and muscle weakness.

Seek emergency help for shortness of breath, chest pain, coughing blood, fainting, or signs of severe infection.

For a gradual cosmetic change without red flags, document it under standardized lighting and review recent weight change, exercise, pregnancy or menopause transition, medications, and prior procedures. That history is more useful than ordering a broad hormone panel.

Bottom Line

Ordinary cellulite is common, structurally complex, and not a marker of poor health. Its visibility can change with fat volume, skin laxity, muscle contour, and imaging conditions. The evidence does not support exact genetic percentages, universal BMI thresholds, an estrogen-only explanation, or guaranteed improvement from resistance training.

The medical task is first to identify look-alikes. Painful or disproportionate tissue may suggest lipedema. Persistent swelling may reflect lymphatic or venous disease. Sudden one-sided warmth, swelling, redness, or pain requires evaluation for infection or thrombosis.

If the concern is cosmetic, some subcision, acoustic-wave, and radiofrequency approaches have real clinical evidence, but study quality, effect size, durability, availability, and adverse effects vary. A treatment decision should use the exact device and procedure evidence, not the generic word “cellulite treatment.”