Dercum’s disease, also known as adiposis dolorosa, is a rare condition in which painful fatty growths develop beneath the skin, most often on the abdomen, arms, and legs. It primarily affects women between the ages of 35 and 50, and the pain it causes can be chronic and debilitating. Because it shares symptoms with several other conditions and has no single definitive test, many people wait years for a correct diagnosis.
Who Gets Dercum’s Disease
Dercum’s disease is 5 to 30 times more common in women than in men. It was originally thought to be a condition of postmenopausal women, but more recent survey data shows that about 86% of patients develop symptoms before menopause, typically between ages 35 and 50. The exact prevalence hasn’t been established, partly because the condition is underdiagnosed and often confused with other pain disorders. Men can develop it too, though cases are far less common.
What the Pain and Symptoms Feel Like
The hallmark of Dercum’s disease is chronic pain in the fatty tissue just under the skin. Patients typically describe it as a deep, aching pain that flares unpredictably. The painful areas may contain distinct lumps (lipomas) or simply feel like diffuse, tender areas of fat. These deposits tend to concentrate on the abdomen, upper arms, and thighs, and they generally don’t shrink with weight loss.
The condition extends well beyond pain. A questionnaire of 110 patients found a wide constellation of symptoms: fatigue, weakness, easy bruising, sleep disturbances, memory problems, difficulty concentrating, depression, anxiety, rapid heartbeat, shortness of breath, joint and muscle aches, bloating, and constipation. Many patients also develop diabetes. This broad symptom profile is part of what makes the disease so disruptive to daily life and so easy to misattribute to other causes.
Quality-of-life research confirms what patients report anecdotally. People with Dercum’s disease score significantly lower on health-related quality-of-life measures compared to control groups, with the combination of chronic pain, fatigue, and cognitive difficulties creating a substantial burden.
What Causes It
The exact cause of Dercum’s disease remains unknown, but researchers have identified three mechanisms that appear to drive it.
The first involves the fat tissue itself behaving abnormally. Painful fat deposits in Dercum’s patients contain elevated levels of certain fatty acids not found in unaffected tissue, and the fat’s ability to convert glucose into stored energy is impaired. These metabolic irregularities suggest something is fundamentally different about the way fat cells function in affected areas, not just how much fat is present.
The second involves the lymphatic system. Specialized imaging has revealed that lymphatic vessels within Dercum’s fatty tissue are abnormally dilated, fibrotic, and poorly functioning. This impaired drainage may contribute to lipoma formation and chronic swelling. Early observations by the disease’s namesake, Dr. Francis Xavier Dercum, linked the lymphatic system to the condition over a century ago, and modern imaging is now supporting that connection.
The third mechanism centers on how pain signals go haywire. Sensory nerves in the affected tissue release signaling molecules that cause local inflammation, drawing immune cells into the area and making the surrounding nerve endings increasingly sensitive. Over time, this can lead to a phenomenon called central sensitization, where the spinal cord and brain begin amplifying pain signals even in the absence of new tissue damage. This may explain why the pain in Dercum’s disease is so persistent and disproportionate to what physical examination alone might suggest.
How It’s Diagnosed
There is no blood test, imaging scan, or biopsy that confirms Dercum’s disease. Diagnosis is clinical and based on exclusion, meaning your doctor needs to identify the characteristic pattern of symptoms and rule out other conditions that look similar. The most widely cited diagnostic criteria require two things: being overweight or obese, and having chronic pain in subcutaneous tissue lasting more than three months. These criteria still await formal validation, and no official clinical guidelines exist.
The conditions that need to be ruled out include:
- Lipedema: symmetrical fat buildup in the lower legs that spares the trunk, without discrete lumps or the neuropsychiatric symptoms common in Dercum’s
- Fibromyalgia: widespread pain with tender points, fatigue, and sleep problems, but no fatty lumps or localized painful fat deposits
- Familial multiple lipomatosis: an inherited condition that produces multiple lipomas that are not painful
- Madelung disease: painless fatty masses around the neck and shoulders, most common in men with a history of heavy alcohol use
- Panniculitis: inflammation of fat tissue that typically causes visible skin changes like redness, which Dercum’s does not
- Liposarcoma: a malignant fat tumor that may require biopsy to rule out, especially if a mass is growing rapidly or feels unusually firm
Because the symptom overlap with fibromyalgia and depression is especially large, some patients receive those diagnoses first and only learn about Dercum’s disease years later when painful lumps become more prominent or numerous.
Treatment Options
No cure for Dercum’s disease exists, and treatment focuses on managing pain and improving function. Approaches fall into two broad categories: medications and surgical procedures.
Pain Medications
Standard pain relievers often provide limited relief. One treatment that has shown promise in case reports is intravenous lidocaine, a local anesthetic delivered through an IV. In documented cases, patients experienced complete pain relief lasting anywhere from 8 days to 2 months after infusion. Placebo infusions, by contrast, provided no relief. Some patients were then switched to a related oral medication and continued to experience pain control. These findings come from small case series rather than large clinical trials, so access to this approach depends heavily on finding a provider familiar with the disease.
Liposuction
Liposuction is the most studied procedural treatment. A prospective study of 53 patients found that both subjective pain reports and objective pain measurements improved significantly after liposuction compared to before surgery and compared to untreated controls. The catch is that pain relief diminished over time, though a measurable difference from baseline still lingered five years after the procedure. Quality-of-life scores also improved slightly after liposuction, though they didn’t reach the levels seen in people without the disease. One theory for why liposuction helps is that it physically disrupts abnormal nerve connections in the fatty tissue, interrupting pain signaling at the source.
Surgical excision of individual lipomas is another option when specific lumps are causing concentrated pain, though new growths can develop in other locations. Neither liposuction nor excision is a permanent solution, and some patients undergo repeat procedures over the course of their lives.
Living With Dercum’s Disease
Dercum’s disease is a chronic, progressive condition. The fatty deposits tend to increase in number and size over time, and the pain can fluctuate between manageable periods and severe flares. Because the disease affects energy, cognition, mood, and physical comfort simultaneously, its impact on daily functioning is often greater than the physical findings alone would suggest.
The rarity of the condition creates its own challenges. Many healthcare providers have never encountered it, which can lead to dismissal of symptoms or repeated misdiagnosis. Connecting with specialists who have experience with adipose tissue disorders, often found at academic medical centers, can make a significant difference in both diagnosis speed and treatment quality. Patient advocacy groups and online communities have also become important resources, since for a condition this uncommon, other patients are often the best source of practical day-to-day guidance.