The Most Common Benign Skin Lesions
The vast majority of skin growths that patients present with are benign. The challenge is knowing which ones to have assessed — and which reassurance-seeking searches are simply anxiety rather than a real warning sign. This guide covers the most frequently encountered benign lesions in primary care.
Important caveat: This guide is for general education only. If you have a skin lesion that concerns you — even if it matches one of the benign descriptions below — a clinical assessment with dermoscopy provides certainty that a photograph or self-examination cannot.
Skin Tags (Acrochordons)
Soft, fleshy outgrowths hanging from a thin stalk. Most common on the neck, armpits, groin, and under the breasts. Caused by skin friction combined with a constitutional tendency. Entirely benign. The NHS considers them cosmetic — private removal is quick and simple.
Key feature: Hangs on a stalk, soft to the touch, skin-coloured or slightly darker.
Seborrhoeic Keratoses (Seborrhoeic Warts)
Warty, "stuck-on" growths ranging from pale tan to dark brown or black. Common from middle age. Not caused by a virus. Entirely benign but can resemble melanoma — always worth assessing if you're uncertain, particularly if dark, irregular, or new.
Key feature: "Stuck on" waxy appearance, often with a rough or warty surface, may have visible white cyst-like dots (milia-like cysts).
Epidermoid Cysts
Smooth, round, mobile lumps beneath the skin surface — often with a visible central punctum (a small dark spot where the cyst opens to the surface). Filled with keratin (skin protein), not pus. They can become inflamed and uncomfortable if traumatised, and infected cysts may need drainage. They do not resolve spontaneously and tend to recur if not excised completely.
Key feature: Smooth round lump that moves freely under the skin, central punctum often visible, cheesy or paste-like contents if it ruptures.
Lipomas
Soft, mobile, rubbery lumps of fatty tissue just beneath the skin surface. Very slow-growing. Most common on the upper back, shoulders, upper arms, and neck. Soft and mobile — you can usually move them under the skin. Entirely benign. Large or painful lipomas can be removed surgically.
Key feature: Soft, lobulated, moves freely, not attached to overlying skin. Usually painless.
Warts (Verrucae)
Raised growths caused by the human papillomavirus (HPV) — not the strains linked to cervical cancer. Common on hands, fingers, knees, and the soles of the feet (plantar warts/verrucas). Distinctive black dots (thrombosed capillaries) visible on the surface under close inspection. Many resolve spontaneously in children; adults often need treatment to clear them.
Key feature: Rough, raised, cauliflower surface; black dots visible; firm to touch; can be painful under foot.
Dermatofibromas
Small, firm, slightly raised nodules most commonly on the lower legs. Brownish or skin-coloured. When pinched from both sides, they typically dimple inwards — the "dimple sign" — which is characteristic. Usually discovered incidentally. No treatment required; they can be excised if bothersome.
Key feature: Small, firm, slightly pigmented, puckering inward when pinched. Most common on legs.
Cherry Angiomas
Bright red, smooth, dome-shaped spots — collections of dilated blood vessels (capillaries) just below the skin surface. Very common from the 30s onwards, increasing in number with age. Completely benign. They blanch briefly when pressed. Removal is cosmetic only and can be done with electrocautery or cryotherapy.
Key feature: Bright red, smooth, perfectly round, blanches on pressure. Can appear anywhere on the body, most common on the trunk.
When to Get Something Checked
Regardless of how reassuringly "benign" a lesion sounds from a description, see a GP promptly if any skin growth:
- Is new and has grown rapidly over weeks
- Has changed in colour, size, or shape
- Has an irregular or blurred border
- Contains multiple colours within a single lesion
- Bleeds spontaneously or with minimal contact
- Itches persistently
- Is a non-healing sore or ulcer
- Simply concerns you — peace of mind has value
Book a Skin Lesion Assessment
Lambert Medical Practice offers private dermatology assessments including dermoscopic examination of skin lesions. Same-week appointments available, no GP referral required.