The primary hormone linked to fat accumulation around the neck (often a "buffalo hump") is cortisol, the stress hormone, with high levels causing fat storage in the neck, abdomen, and face, often seen in Cushing's syndrome or from long-term steroid use. Thyroid issues (hypothyroidism) and insulin imbalances can also contribute by slowing metabolism and affecting fat distribution.
High levels of the hormone cortisol can lead to increased fat synthesis. With Cushing syndrome, the fat produced often deposits in the neck, known as lipodystrophy. This produces the characteristic buffalo hump.
The most common cause of buffalo hump is having too much cortisol in your body, known as Cushing syndrome. Cortisol is a steroid hormone your adrenal glands make. Having too much cortisol makes your body form more adipose (fat) tissue than usual.
Neck fat usually shows up as a double chin or fullness around the jawline. It develops for several reasons, including genetics, weight gain, ageing, and even poor posture.
Sudha Penumala, MD: Yes, inappropriately elevated cortisol for a long period of time can change the face shape. It causes more rounding of the face. Typically, there is weight gain in the face and in the abdomen. It can also cause fat accumulation at the back of the neck.
Symptoms include:
Pre-Cushing's syndrome (PCS) is defined as an overproduction of cortisol by an adrenal adenoma, without physical changes on clinical examination.
4. Avoid processed foods and sugary drinks, as they can contribute to weight gain in the neck area. Avoiding processed foods and sugary drinks can be beneficial for weight management and can help prevent weight gain in the neck area.
It's also true that excess cortisol in the body can cause a buffalo hump. This hormone is associated with many things, but one of them is stress. If practices like yoga, stretching, and exercise help to calm you, they could help to reduce the amount of cortisol in your system.
Typically a larger neck is an indication of excess weight elsewhere, so in most cases, weight loss will help to decrease the size of the neck. To check your neck circumference at home, all you need is a plastic or paper measuring tape – it's quick and easy!
High cortisol levels, often from chronic stress or conditions like Cushing's Syndrome, cause symptoms like weight gain (especially around the belly, face, and neck), fatigue, high blood pressure, high blood sugar (leading to diabetes), thinning skin, easy bruising, acne, and mood changes (anxiety, irritability), plus potential issues with sleep, digestion, and reproductive health.
How To Reduce Cortisol
Hormonal imbalances, such as those from diabetes or polycystic ovarian syndrome, can result in fat deposits in the neck area. This, combined with poor posture, amplifies the hump's appearance.
Wrinkles: Fine lines appear more pronounced, especially around the eyes and mouth.. Sagging: Loss of firmness in the jawline and cheeks. Dullness: Your skin loses its natural radiance, appearing more lackluster.
Here are 9 signs your hormones may be out of whack:
Best Foods for Skin Tightening and Fat Reduction
Some foods support collagen production and skin elasticity, helping to tighten sagging skin: Vitamin C-rich foods (oranges, bell peppers, strawberries) boost collagen.
Excess cortisol can lead to symptoms such as irritability, depression, mood swings, anxiety, memory loss, poor sleep, fatigue, weakness, and signs such as weight gain, a rounded or “moon” face, a fatty hump at the back of the neck, muscle loss, bone fractures, and easy bruising of the skin.
The good news is that getting rid of a neck hump — especially those caused by poor posture or excess weight — is as simple as incorporating a few lifestyle changes. "Improving posture and maintaining a healthy weight are key," Dr. Hwang says.
There's no quick fix for cortisol belly, but consistent lifestyle changes work. Evidence-backed supplements may help, but sleep, strength training, nutrition, and stress management are what actually reduce hormonal belly fat over time.
Many factors, including genetics, weight gain, hormonal changes, medical conditions, poor posture, sedentary lifestyles, and unhealthy diets, can contribute to the development of neck fat. Sometimes, it is genetic that may be the main cause.
Neck Fat is caused by the build-up of fat layers just below your chin. This fat is technically known as submental fat and is often associated with weight gain. Often, a fat neck is known as a double chin, which describes the layers of neck fat rolls that typically appear when someone has this condition.
Double Chin Caused by Thyroid
When the skin present below the jaw bone begins to sag and fills up with fat, then there can be a development of double chin, caused by thyroid. Usually, when the lymphatic system gets raided with bacteria, it gets processed and expelled by the liver.
How to prevent cortisol spikes at night? Prevent cortisol spikes at night by keeping stress low, getting enough sleep, staying in sync with your circadian rhythm (or body clock), avoiding late-night intense exercise, and eating a healthy diet.
Symptoms