Skin lesions refer to any abnormal change, growth, or mark on the skin. They can appear in many forms, including moles, warts, skin tags, and keratoses, and may be present from birth or develop over time. Most lesions are harmless and purely cosmetic, while others may require assessment if they change in size, colour, or shape. Professional evaluation helps determine whether a lesion is benign and whether removal is recommended for comfort, appearance, or medical reasons.