14/04/2026
🧴 TYPES OF COMMON SKIN LESIONS — EDUCATIONAL GUIDE
Skin lesions are abnormal changes in the skin’s structure or appearance. They may be benign, infectious, inflammatory, or precancerous, so recognizing them early is important for proper care and timely treatment.
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🔴 1. Actinic Keratosis
What it is: Rough, scaly patches caused by long-term sun exposure.
Key features: Dry, crusty surface; red, pink, or brown.
Common sites: Face, scalp, ears, hands.
Clinical importance: Precancerous — may progress to squamous cell carcinoma.
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🟡 2. Sebaceous Hyperplasia
What it is: Enlargement of oil (sebaceous) glands.
Key features: Small yellowish bumps with a central depression (umbilication).
Common sites: Forehead, cheeks.
Clinical importance: Benign and harmless.
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🟣 3. Molluscum Contagiosum
What it is: Viral skin infection (poxvirus).
Key features: Small, dome-shaped, flesh-colored lesions with central dimpling.
Transmission: Skin-to-skin contact.
Clinical importance: Usually self-limiting but contagious.
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🔵 4. Dermatofibroma
What it is: Benign fibrous skin growth.
Key features: Firm nodule with “dimple sign” when pressed.
Common sites: Legs.
Clinical importance: Harmless.
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🟤 5. Epidermoid Cyst (Keratinous Cyst)
What it is: Cyst filled with keratin under the skin.
Key features: Round lump with a central punctum (black dot).
Common sites: Face, neck, back.
Clinical importance: Benign but may become inflamed or infected.
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🟢 6. Pilar Cyst (Trichilemmal Cyst)
What it is: Cyst from hair follicle sheath.
Key features: Smooth, firm, round lump.
Common sites: Scalp.
Clinical importance: Benign; can grow large.
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🔴 7. Pyogenic Granuloma
What it is: Overgrowth of blood vessels.
Key features: Bright red, soft lesion that bleeds easily.
Triggers: Trauma, pregnancy, irritation.
Clinical importance: Benign but may require removal.
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🟣 8. Venous Lake
What it is: Dilated superficial veins.
Key features: Soft, compressible blue/purple lesion.
Common sites: Lips, ears, face.
Clinical importance: Benign.
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🟤 9. Seborrheic Keratosis
What it is: Benign skin growth.
Key features: “Stuck-on,” waxy, brown or black lesions.
Common in: Older adults.
Clinical importance: Non-cancerous.
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🟠 10. Impetigo
What it is: Bacterial skin infection (usually Staphylococcus or Streptococcus).
Key features: Honey-colored crusted sores.
Common in: Children.
Clinical importance: Contagious; requires treatment.
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🔴 11. Folliculitis
What it is: Inflammation/infection of hair follicles.
Key features: Red bumps or pustules around hair follicles.
Causes: Bacteria, friction, sweat.
Clinical importance: Usually mild; resolves with care.
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🟣 12. Port-Wine Stain
What it is: Capillary vascular malformation.
Key features: Flat pink to dark red patch present at birth.
Course: May darken/thicken over time.
Clinical importance: May require laser treatment.
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🔵 13. Telangiectasia
What it is: Dilated superficial blood vessels.
Key features: Fine red thread-like lines.
Causes: Sun damage, aging, rosacea.
Clinical importance: Benign but cosmetic concern.
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🟤 14. Dysplastic Nevus (Atypical Mole)
What it is: Mole with abnormal features.
Key features (ABCDE rule):
• Asymmetry
• Border irregularity
• Color variation
• Diameter > 6 mm
• Evolving changes
Clinical importance: Increased melanoma risk → monitor closely.
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⚪ 15. Halo Nevus (Sutton Nevus)
What it is: Mole with surrounding white ring due to immune response.
Key features: Central mole + depigmented halo.
Clinical importance: Usually benign; may regress.
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🟣 16. Angiokeratoma
What it is: Dilated blood vessels with thickened skin.
Key features: Dark red to purple raised bumps.
Common sites: Ge***al area (e.g., sc***um).
Clinical importance: Benign.
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⚠️ WHEN TO SEE A DOCTOR
Seek medical advice if a lesion:
• Changes in size, shape, or color
• Bleeds, itches, or does not heal
• Becomes painful or infected
• Shows ABCDE warning signs
• Appears suddenly or spreads rapidly
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✅ PREVENTION & SKIN CARE
• Use sunscreen (SPF 30+) daily
• Wear protective clothing and hats
• Maintain proper hygiene
• Stay hydrated and eat a balanced diet
• Avoid smoking and excessive alcohol
• Perform regular skin self-examinations
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🏁 Key Takeaway
Early recognition of skin lesions helps distinguish benign vs potentially dangerous conditions, allowing timely treatment and better outcomes.
Disclaimer: This post is for educational purposes only and not a substitute for professional medical advice, diagnosis, or treatment. See a healthcare provider for personal advice.
