Many people notice soft, rubbery lumps under their skin that move slightly when touched and wonder if they’re dangerous. In most cases, these are lipomas—benign (non-cancerous) fatty tumors. While they rarely cause serious health issues, lipomas can be bothersome or concerning because of their appearance or size. Understanding what lipomas are, why they form, and how they can be managed helps people make informed decisions about their skin and overall health. This is being explained by Dr Amita Jain, who is a top general and laparoscopic surgeon and one of the most experienced lipoma surgeons in Delhi.
What is a Lipoma?
A lipoma is a slow-growing, non-cancerous lump made up of fat cells. It usually develops between the skin and the underlying muscle layer. Lipomas are soft, doughy to the touch, and typically painless unless they press against nerves or contain many blood vessels. They can occur anywhere in the body but are most common on the shoulders, neck, upper back, arms, and thighs.
Most lipomas are small—less than 2 inches (5 cm) in diameter—but in rare cases, they can grow larger. Though they can appear at any age, lipomas are most common in adults between 40 and 60 years of age. Men and women can both develop them, though some studies suggest a slightly higher incidence in women.
Why Do Lipomas Form?
The exact cause of lipomas is not fully understood, but doctors and researchers believe several factors contribute to their formation. These include genetics, trauma, metabolic factors, and certain medical conditions. Let’s look at each in detail:
Genetic Predisposition
One of the strongest links to lipoma formation is heredity. If one or both parents have lipomas, there’s a higher chance their children may develop them as well. This suggests a genetic component—possibly due to mutations in genes responsible for fat cell growth or regulation.S
ome people inherit conditions such as familial multiple lipomatosis, where several lipomas develop across the body. This condition runs in families and often appears in early adulthood.
Minor Injuries or Trauma
In some cases, lipomas appear at the site of a past injury or trauma. Although the exact mechanism is unclear, it’s believed that physical injury may trigger abnormal growth of fat cells during the healing process. This theory, however, remains debated among experts since not all lipomas follow trauma.
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