Written by: Dr. Akash Chandawarkar, Board Certified Plastic Surgeon, Mirror Plastic Surgery | Last updated: September 9, 2026
Introduction To Hip Dips And Treatment Options
Hip dips are skeletal indentations created by the fixed distance between the iliac crest and the greater trochanter. This spacing belongs to your bone structure, not to muscle quality or fitness level. Exercise can build muscle around the area, but it cannot change this bony relationship. Biostimulatory fillers and autologous fat transfer can soften the appearance of hip dips when a qualified, board-certified plastic surgeon performs the treatment.1
Schedule Your Anatomy-Based Hip Dip Consultation to review personalized options with Dr. Akash Chandawarkar at Mirror Plastic Surgery.
Executive Summary Of The Evidence
This article reviews anatomical research, clinical trials on gluteal hypertrophy, regulatory data, and complication rates for hip dip treatments. The evidence shows that hip dips reflect skeletal geometry, specifically the distance between the iliac crest and greater trochanter. Exercise improves muscle mass and shape around the hips and glutes but does not erase the trochanteric depression.1 For patients who want visible contour change, biostimulatory fillers and fat transfer offer documented improvements with different levels of permanence, risk, and maintenance.1
The Anatomy Of Hip Dips
Skeletal Determinants: Ilium, Femur, And The Trochanteric Depression
Hip dips, or trochanteric depressions, sit between the iliac crest of the pelvis and the greater trochanter of the femur. The indentation forms where muscle and fat drape over a bony step between these landmarks. When that soft tissue layer is thin, the skin follows the step and the dip becomes visible. The vertical distance between these bones is genetically set and does not change with diet, exercise, or non-surgical treatments.
Hip dips often appear more defined in lean, athletic people because less fat covers the gap. Weight loss deepens the dip, while weight gain in a gynoid pattern can pad the flank and outer thigh and soften it.
Muscle Architecture Around The Hip Dip
The gluteus medius sits above and around the indentation, not inside the hollow. Cadaveric and biopsy studies show the gluteus medius contains roughly 53% Type I and 47% Type II fibers, fanning from the iliac crest to the lateral surface of the greater trochanter. Strengthening this muscle creates an “upper shelf” but does not bridge the bony gap beneath it.
Critically, in people with low body fat around the glutes, building the gluteus medius can make the natural depression between upper and lower glute more pronounced as the muscle contour stands out. The gluteus minimus supports deep lateral hip contour and joint stability but does not erase the structural dip. The gluteus maximus builds overall buttock mass and can smooth transitions around the hip, yet it still cannot span the specific gap that creates hip dips.
Clinical Evidence: Exercise And Skeletal Limits
Gluteal Hypertrophy And Hip Dip Appearance
A 2023 randomized controlled trial by Plotkin et al. (n=34) in Frontiers in Physiology found that nine weeks of hip thrust or back squat training produced similar gluteal hypertrophy. The authors measured general glute growth and muscle thickness. They did not report elimination of hip dips or changes in the trochanteric depression.
The National Strength and Conditioning Association notes that exercise cannot change skeletal structure, but it can change muscle mass and distribution around that structure. The American College of Sports Medicine supports this view and attributes skeletal architecture to genetics.
Why “Fill Hip Dips With Muscle” Claims Fall Short
Muscle cannot fill hip dips because the skeletal gap remains fixed. The lowest point of the hip dip lies over the iliotibial band and greater trochanter, which consist of tendon and bone that do not hypertrophy with training. Consequently, squats and hip thrusts build the gluteus maximus and shape the buttock, but they do not change the lateral depression. Programs that promise to “erase” hip dips through exercise alone describe a change in bone proportion that training cannot achieve.
Evidence-Based Exercise Recommendations And Their Limits
Exercise cannot remove hip dips, yet targeted training can improve overall gluteal shape, posture, and confidence. These changes may slightly soften the visual contrast of the dip. Effective exercises for the gluteus medius include:
- Cable lateral abduction with the leg crossed slightly behind the midline
- Side-lying leg lifts with external rotation
- Clamshells with resistance bands
- Forward-leaning seated hip abduction with a 30–45° torso lean to shift load from TFL to gluteus medius
- Hip thrusts for gluteus maximus development and overall posterior projection
Results always reflect your anatomy. Even the significant gluteal hypertrophy shown in the 2023 randomized trial did not change the trochanteric depression. Consistent training supports strength and shape, but expectations need to match skeletal reality.1
Non-Surgical Hip Dip Treatment: Biostimulatory Fillers
Regulatory Status And Product Selection
The FDA has not approved any dermal filler specifically for hip or buttock injection, so all use in this area is off-label. Even so, clinical experience and published data support certain biostimulatory products for hip dip contouring. The table below compares three commonly used options.
| Product | Mechanism | Reported Longevity | Evidence Base |
|---|---|---|---|
| Radiesse (CaHA) | Immediate volume from a gel carrier plus collagen stimulation as the carrier absorbs over 3–6 months | Typically 12–18 months, extendable with maintenance1 | FDA-approved since 2006; more than 20 years of published clinical use |
| AlloClae (adipose-derived allograft) | Donor fat allograft that provides structural volume | Varies by individual response, often 12–24 months1 | Distributed under FDA HCT/P rules (Section 361); no registered clinical trials as of August 2026 |
| Sculptra (PLLA) | Collagen stimulation without immediate volume, with results building over 2–3 months | Up to 24 months, with typical annual touch-ups1 | 2026 multicenter study (n=498) where hip dips accounted for 8.8% of nonfacial sessions; 6.6% adverse event rate with no serious complications |
Dr. Akash Chandawarkar sits on advisory boards for Merz Aesthetics (Radiesse) and Tiger Aesthetics (AlloClae). This role gives him direct insight into product mechanisms, protocols, and ideal patient selection, which shapes every treatment plan at Mirror Plastic Surgery.
Clinical Outcomes And Safety Data
A 2026 multicenter retrospective review of 498 patients treated with PLLA for nonfacial areas reported a 6.6% adverse event rate, mainly bruising, and no serious complications1. Hip dip treatments made up 8.8% of nonfacial sessions (146 of 1,651), and 96.4% of subjects were female with a mean age of 42.1 years. This evidence is supported by a 2024 split-body randomized clinical trial (SPLASH) by Zubair et al., which further evaluated PLLA for hip dip depressions.
Technique strongly influences safety. Product should be placed in the superficial subcutaneous plane of the lateral trochanteric depression using a long blunt cannula, where vessels measure about 1 mm. Deep placement into the gluteal muscle increases the chance of serious vascular complications.
Discuss Your Hip Dip Filler Options With Dr. Chandawarkar to match product choice and technique to your anatomy and goals.
Surgical Hip Dip Treatment: Fat Transfer
Fat Transfer Outcomes For Hip Dip Correction
A 2026 retrospective series of 112 women who underwent gluteal and hip fat grafting reported 97.6% improvement on the Global Aesthetic Improvement Scale1. The total complication rate was 14.6%, mostly minor contour irregularities (7.8%) and seromas treated with needle aspiration (5.6%)1. No serious adverse events occurred, and mean volume grafted per hip dip area was 45 cc.
The lateral hip offers a safer injection site than the central buttock because the trochanter and iliotibial band lie beneath the graft and large veins are absent in the subcutaneous plane. Fat transfer can provide lasting structural correction when patients have enough donor fat and meet surgical criteria.1 Very lean patients, who often notice hip dips most, may not have sufficient donor fat for meaningful change.
Safety Considerations For Surgical And Non-Surgical Options
Current BBL mortality is about 1 in 14,921 when surgeons use subcutaneous-only injection with ultrasound guidance. This rate reflects an 80% reduction from earlier estimates. Anatomical dissection studies show that all fatal cases involved fat placed deep within the gluteal muscle rather than in the subcutaneous plane.
Fat transfer offers durable results but requires surgical recovery, compression garments, and avoiding pressure on the lateral hips for two to three weeks. Non-surgical biostimulatory fillers carry a lower overall risk but require periodic maintenance to preserve results.
Choosing A Provider For Hip Dip Treatment
Provider selection directly affects both safety and outcome quality. Look for the following:
- Board Certification in plastic surgery by the American Board of Plastic Surgery
- Anatomical Expertise with injections placed in the superficial subcutaneous plane using blunt cannulas
- Transparent Communication about off-label use, realistic outcomes, and maintenance needs
- Safety Protocols for product selection, technique verification, and complication management
An honest consultation sometimes concludes that the contour reflects your skeleton and that no proportionate procedure will change it significantly. In that case, treatment may not be recommended. At Mirror Plastic Surgery, Dr. Chandawarkar’s concierge-style consultations can last up to an hour and focus on your anatomy, motivations, and realistic outcomes before any plan is finalized.
Psychological Perspective: Hip Dips As Normal Anatomy
Hip dips are a normal anatomical feature and are not classified as a health concern by the WHO or ACSM. They appear across body types, fitness levels, and genders. Hip dips often look more visible with weight loss, including weight loss from GLP-1 medications, because reduced subcutaneous fat reveals the underlying skeleton.
The choice to treat hip dips is personal. The most grounded decisions come from your own preferences rather than outside pressure. If you explore treatment, working with a surgeon who values honest communication over procedure volume supports both safety and satisfaction.
Frequently Asked Questions
Can You Fill Hip Dips With Muscle?
Hip dips arise from the distance between the iliac crest and the greater trochanter, which defines a skeletal feature. Muscle grows around this gap but does not bridge it. The gluteus medius sits above and lateral to the indentation rather than inside it. In lean people, building this muscle can highlight the dip by increasing contrast between the developed muscle and the bony depression. Training cannot change the underlying bone structure.
Do Squats Fill Hip Dips?
Squats primarily build the gluteus maximus and shape the back of the buttock, not the lateral hip depression. The lowest point of the hip dip lies over the iliotibial band and greater trochanter, which consist of tendon and bone that do not hypertrophy. Hip thrusts create similar glute growth. The 2023 randomized trial mentioned earlier showed comparable hypertrophy from both exercises, with no removal of hip dips.
What Is The Best Filler For Hip Dips?
Biostimulatory fillers are the main non-surgical choice for hip dip contouring. Radiesse (calcium hydroxylapatite) provides immediate volume plus collagen stimulation, with typical results lasting 12–18 months1. AlloClae, an adipose-derived allograft, offers structural volume from donor fat tissue. Sculptra (poly-L-lactic acid) builds collagen gradually over two to three months and can last up to 24 months1. The ideal product depends on your anatomy, dip depth, and goals, which a board-certified plastic surgeon should assess in person.
How Long Do Hip Dip Fillers Last?
Longevity varies by product and metabolism. Radiesse usually lasts 12–18 months. Sculptra can last up to 24 months, with yearly touch-ups to maintain volume. AlloClae duration differs by individual response. The lateral hip has lower blood flow than the face, so fillers often metabolize more slowly there. All non-surgical options require maintenance sessions over time.
Is Hip Dip Filler Safe?
Hip dip filler can be safe when a qualified, board-certified physician uses proper technique. The multicenter PLLA study cited earlier reported a 6.6% adverse event rate, mainly bruising, with no serious complications. Safety depends on placing product in the superficial subcutaneous layer with blunt cannulas rather than into muscle. All hip filler use is off-label, and the lack of large veins in the lateral subcutaneous plane makes this site safer than deep gluteal injection. Choosing an experienced provider remains the most important safety factor.
Conclusion: Choosing An Evidence-Guided Path
The research shows that hip dips reflect skeletal structure and normal anatomy. Exercise supports strength and gluteal shape but does not change bone. For people who want visible softening of hip dips, biostimulatory fillers and fat transfer provide documented options when performed by board-certified physicians who prioritize safety, anatomy, and honest guidance.
At Mirror Plastic Surgery, Dr. Akash Chandawarkar combines Harvard education, Johns Hopkins plastic surgery training, and advisory roles with Radiesse and AlloClae in every consultation. His process begins with a clear anatomical assessment, and sometimes that assessment supports confidence without treatment. That level of transparency guides every patient relationship at Mirror.
Request Your Personalized Hip Dip Evaluation With Dr. Chandawarkar at Mirror Plastic Surgery in St. Petersburg, FL, and learn whether treatment fits your anatomy, goals, and comfort level.
Disclaimer: Results may vary from person to person. Editorial content, before and after images, and patient testimonials do not constitute a guarantee of specific results.
1 Results may vary from person to person. Editorial content, before and after images, and patient testimonials do not constitute a guarantee of specific results.
