It often starts as a small lump. Painless, firm, maybe even mobile beneath the skin. One day you notice it in the mirror or while washing your face. The question comes quickly: What is it?
Could it be a sebaceous cyst, an ingrown hair, or just a stubborn pimple? Each is common, but they need different care—and in some cases, professional treatment. Here’s how to tell them apart and what to do next.
What Is a Sebaceous Cyst?
A sebaceous cyst is a slow-growing, round lump under the skin. It’s usually filled with keratin—a soft, cheese-like substance—not sebum as the name might suggest. These cysts often form when the opening of a hair follicle gets blocked. You might notice a tiny dark spot (called a punctum) on top of the bump.
They’re typically not painful unless they become infected, but they can linger for months or years. If irritated or squeezed, a sebaceous cyst may swell, turn red, or even leak a foul-smelling discharge.
Signs it could be a sebaceous cyst:
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Soft or firm dome-shaped lump under the skin
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Usually painless
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May move slightly under the skin when touched
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Has a central pore or dot
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Grows slowly over time
Most are harmless, but if the cyst becomes sore, enlarged, or starts to drain, it’s best to get it checked. At Perfect Image Consultants, we offer quick, minimally invasive procedures to remove sebaceous cysts safely—often with minimal scarring and no downtime.
How Is It Different from an Ingrown Hair?
An ingrown hair forms when a shaved or plucked hair grows back into the skin. This can lead to a small red bump, often itchy or inflamed. Ingrown hairs are common in areas where we regularly remove hair—such as the beard, bikini line, or legs.
If you look closely, you might even spot the trapped hair inside. These bumps can sometimes get infected, but they usually go away with proper skin care, gentle exfoliation, and a break from shaving.
Signs of an ingrown hair:
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Small red or pink bump
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Itchy or sore
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Hair trapped under the skin
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Common in freshly shaved areas
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Appears suddenly after hair removal
What About a Pimple?
Pimples happen when pores get clogged with oil, dead skin, and bacteria. A whitehead sits close to the surface. A deep, painful lump might be a cystic acne lesion—especially if it comes and goes during hormonal shifts or appears in oily zones like the T-zone, back, or chest.
Unlike sebaceous cysts, pimples change more quickly. They often come to a head within days and respond to over-the-counter spot treatments or prescription skincare.
Signs of a pimple:
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Red or white bump
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Tender to touch
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Can fill with pus
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May clear or change within a week
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Often appears in clusters
When to See a Skin Specialist in London
Not all bumps need a doctor—but some do. You should consider seeing a specialist if:
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The lump is growing or painful
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It keeps coming back
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It becomes red, hot, or starts leaking fluid
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You’re unsure what it is
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It’s affecting your confidence or quality of life
At Perfect Image Consultants, our London-based skin specialists assess, diagnose, and remove sebaceous cysts and other common skin concerns with care and discretion. Whether you’re dealing with a frustrating mystery bump or just want peace of mind, we’re here to help.
Simple Steps to Keep Skin Healthy
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Don’t squeeze bumps. You risk pushing infection deeper or causing scarring.
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Exfoliate gently once or twice a week to prevent clogged pores and ingrown hairs.
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Moisturise daily with non-comedogenic products.
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Use clean razors and shave in the direction of hair growth to reduce ingrown hairs.
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Know your skin. Any change in size, colour, or texture is worth checking.
Skin lumps are common—but they don’t have to be confusing. If something feels off or keeps returning, don’t wait it out. Whether it’s a sebaceous cyst, ingrown hair, or acne bump, getting the right diagnosis is the first step to smoother, clearer skin. We’re here for that.
