10 Common Skin Lumps with Pictures – When to worry and When to see a Doctor
Your skin is your body’s largest organ – keeping an eye on any changes can help spot problems early – NHS.uk, skin cancer and skin lumps guide
1. Lipoma
Soft, fatty lump under the skin that moves slightly when pressed.
When to worry: If it grows fast or becomes painful.
2. Sebaceous cyst
Smooth, round lump filled with fluid or pus, often with a central dot.
When to worry: If it gets red, swollen, or leaks.
3. Skin Tag
Small, soft flap of skin, often on the nect or underarms.
When to worry: Rarely a concern, unless it bleeds or grows.
4. Basal cell carcinoma
Shiny or pearly bump, may scab or bleed but not heal.
When to worry: Always needs a GP review.
5. Dermatofibroma
Firm, small bump, usually on legs, that feels like a button under the skin.
When to worry: If it bleeds or changes in colour.
6. Ganglion cyst
Round lump near joints or tendons, usually on the wrist or ankle.
When to worry: If it hurts or affects movement.
7. Keratoacanthoma
Fast-growing dome-shaped lump, often with a central crater.
When to worry: Always check with a GP.
8. Pillar cyst
Smooth lump on the scalp, often from a hair follicle.
When to worry: If it becomes painful or infected.
9. Melanoma
Dark, uneven mole or lump that may grow or change shape.
When to worry: Always urgent – get checked straight away.
10. Enlarged lymph node
Firm lump under the skin, often in neck, armpit, or groin.
When to worry: If it stays over 2 weeks or keeps growing.
Summary
If you notice a new lump, or one that changes in size, shape or colour, don’t wait – contact your GP for a check-up.
