Big Cyst on the Back: What It Is and How to Handle It
Discovering a large bump on your back can be both uncomfortable and alarming. While there are many possible causes, one of the most common is a sebaceous or epidermoid cyst—a slow-growing, benign lump that often appears in areas like the back where oil glands are active.
What Is a Back Cyst?
A back cyst is a closed sac under the skin that’s usually filled with sebum (oil), keratin, or other skin debris. These cysts can range in size from a small pimple to a large, noticeable lump. Though often painless, larger cysts may become tender, inflamed, or even infected, especially when irritated by clothing or pressure.
Common Causes
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Blocked oil glands or hair follicles
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Build-up of keratin (a skin protein)
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Friction or trauma to the area
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Genetic conditions or acne-prone skin
Back cysts are often epidermoid or sebaceous cysts, both of which are benign but can grow over time.
Symptoms to Watch For
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A firm, round lump beneath the skin
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Skin-colored or slightly red
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Can be movable or fixed in place
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May drain a thick, foul-smelling substance if ruptured
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Pain or swelling (especially if infected)
If the cyst becomes suddenly painful, red, or starts to drain pus, it's likely infected and needs medical attention.
Treatment Options
Do not attempt to pop or squeeze a back cyst—especially large ones. This can lead to infection, scarring, and even deeper cyst formation.
Instead, consider:
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Warm compresses to reduce inflammation
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Topical antibiotics if irritation begins (consult a doctor)
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Steroid injections to reduce swelling
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Surgical removal — the most effective and permanent treatment
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Drainage — offers temporary relief but may not prevent recurrence
For large or persistent cysts, dermatologist evaluation is the best route to prevent complications and ensure complete removal.
Final Thoughts
A large cyst on your back can be uncomfortable and unsightly, but it’s usually not dangerous. The key is proper care and professional treatment, especially if the cyst is growing, painful, or repeatedly infected. Don’t ignore it—relief is easier than you think with the right approach.
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