Excess Skin After Weight Loss: Causes and Treatment Options
Excess skin after weight loss happens because skin that has been stretched for years loses its ability to shrink back. After a large loss, it can hang in folds that cause rashes, chafing and hygiene problems. Good skin care helps manage these, but surgery is usually needed to remove a large amount of loose skin.
If you’re reading this, you’ve probably done something hard. Losing a lot of weight takes persistence, and it can be frustrating to find that your body doesn’t feel the way you expected afterwards. This page explains why it happens, what it can mean day to day, and the options available.
Why doesn’t skin shrink after major weight loss?
Skin contains two proteins that give it structure and stretch: collagen and elastin. When skin is stretched over a long period, those fibres are damaged and the skin loses much of its recoil. Once the fat beneath it shrinks, the skin envelope stays larger than the body it covers.
Some factors make loose skin more likely:
- Amount of weight lost. The larger the loss, the more surplus skin.
- Time spent at a higher weight. Skin that was stretched for many years has less capacity to recover.
- Speed of weight loss. Rapid loss, such as after bariatric surgery or with weight loss medication, gives skin little time to adapt, although even slow loss often leaves loose skin when the amount is large.
- Age. Skin naturally makes less collagen as we get older.
- Genetics, sun exposure and smoking, which all affect skin quality.
Stretch marks are a visible sign of the same damage. Where you have them, the skin is unlikely to tighten much on its own.
Where does loose skin usually appear?
Loose skin can show up almost anywhere, but some areas are more common than others:
- Lower abdomen, often as a fold that hangs over the pubic area
- Hips, flanks and lower back, creating a roll around the waist
- Upper arms, with skin hanging from the underside
- Inner thighs, where skin rubs together when walking
- Upper back, with rolls around the bra line
- Breasts and chest, which can lose volume and sit lower
- Face and neck, which are less often the main concern but can change too
What problems can excess skin cause?
Loose skin is often thought of as a cosmetic issue, but for many people the bigger problems are practical. Common ones include:
Rashes in skin folds (intertrigo)
Warm, moist skin folds rub together and break down, which can lead to redness, soreness, a bad smell, and fungal or bacterial infections.
Hygiene difficulties
Keeping skin under heavy folds clean and dry can take time and effort every day.
Chafing and pain
Skin on the thighs and arms may rub during walking or exercise, sometimes until it bleeds.
Limits on exercise
Some people find running, swimming or gym classes uncomfortable, which can make it harder to keep the weight off.
Clothing fit
Finding clothes that fit around folds, especially on the arms, waist and thighs, can be difficult.
Back and posture discomfort
Heavy abdominal skin can cause back and posture discomfort.
If any of these sound familiar, keep a record. Notes on how often rashes occur, what treatment you’ve used, and how loose skin affects your activities help your GP, and they can matter later if Medicare criteria are being assessed.
What can I do without surgery?
Non-surgical care won’t remove large amounts of loose skin, but it can make a real difference to comfort and skin health. It is also the first step before any surgery is considered.
- Keep skin folds clean and dry. Wash daily with a gentle cleanser, dry thoroughly, and change out of damp clothing promptly.
- Use barrier products. Barrier creams and moisture-wicking fabric placed in skin folds reduce friction and dampness. A pharmacist or GP can suggest suitable products.
- See your GP about rashes. A rash that keeps coming back may need treatment, so get it checked rather than waiting.
- Wear supportive clothing. Compression garments and well-fitted underwear can lift and support loose skin during activity.
- Build muscle. Strength training improves the shape and tone under the skin. It won’t shrink the skin itself, but it supports overall health and weight stability.
- Protect your nutrition. Adequate protein, iron and vitamins help skin health, particularly after bariatric surgery. Your GP or bariatric team can check your levels.
- Don’t smoke or vape. Smoking damages collagen and slows healing.
Non-surgical tightening treatments, such as radiofrequency or ultrasound devices, are sometimes advertised for loose skin. They are not designed to remove the amount of skin left after massive weight loss.
When does surgery become an option?
Surgery comes into the picture when loose skin keeps causing problems even with good daily care, and your weight has settled. Before planning an operation, a plastic surgeon will usually want to see:
- A steady weight for 6 to 12 months or more, at or near a weight you can keep long term
- A gap of 12 to 18 months after bariatric surgery, if that’s how you lost the weight
- Healthy nutrition levels, which your GP can check with a blood test
- No smoking or vaping
- Good general health, with any conditions like diabetes under control
- A clear view of the trade-off: you swap loose skin for permanent scars, and recovery takes weeks, sometimes months
Lost weight with medication? The same applies to you. Let your weight settle first, and ask the doctor who prescribes it whether you’ll be staying on it long term.
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Which procedure treats which area?
Each area of loose skin is treated by a specific operation. Many people need more than one, usually staged months apart.
Lower abdomen
Abdomen, hips, flanks and lower back
Upper back and bra line
Upper arms
Inner thighs
Breasts
For a full overview of staging, eligibility, recovery and risks, see our guide to body contouring after massive weight loss.
Is skin removal surgery covered by Medicare?
Sometimes. Medicare has specific items for removing excess skin after significant weight loss, but they only apply when strict criteria are met. These usually include a skin condition that hasn’t improved after 3 months of treatment, problems with daily activities, and weight that has been stable for at least 6 months. Our page on Medicare and skin removal surgery explains each item.
Where to start
The first step is a visit to your GP. Talk about how the loose skin affects your daily life, have any rashes treated and recorded, and ask for a referral to a specialist plastic surgeon. Our guide on asking your GP for a referral has tips on what to say.
Dr Matthew Peters (FRACS Plast.) is a Brisbane specialist plastic and reconstructive surgeon whose clinical interests include body contouring after massive weight loss. He consults at Valley Plastic Surgery in Fortitude Valley. To book, call (07) 3488 8118 or make an enquiry.
Frequently Asked Questions
Small amounts may improve over a year or two, especially in younger people. After a large weight loss, most loose skin won’t tighten enough on its own to resolve the problems it causes.
Exercise builds muscle under the skin, which can improve shape. It doesn’t shrink skin that has lost its elasticity.
It varies, but loose skin is common after losing a large share of your body weight. Age, genetics and how long the weight was carried all play a part.
It may help a little, but when the total loss is large, slow weight loss doesn’t usually prevent loose skin.
The skin changes are the same, but loss is often fast and nutrition can be affected. Many surgeons suggest waiting 12 to 18 months after bariatric surgery, with weight stable for at least six months, before skin removal.
There are several operations depending on the area: abdominoplasty, belt lipectomy, arm lift, thigh lift, back bra lift and breast lift. Together they are known as body contouring after weight loss.
Disclaimer: Any surgical or invasive procedure carries risks. Before proceeding, you should seek a second opinion from an appropriately qualified health practitioner. This page provides general information only and is not a substitute for individual medical advice.