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❇️ Important Skin Problems: * Pustule – Small, raised, pus-filled lesion commonly seen in bacterial infections, acne, and folliculitis. * Fissure – A deep crack or split in the skin, often due to dryness, eczema, or fungal infections (like athlete’s foot). * Scar – A healed area of skin that forms after injury or surgery when normal tissue is replaced with fibrous tissue. * Eczema (Dermatitis) – Inflamed, red, itchy patches caused by skin barrier dysfunction and immune hypersensitivity. * Papules – Small, solid, raised bumps seen in acne, dermatitis, viral infections, and insect bites. * Tumor – A solid, abnormal mass; may be benign (lipoma) or malignant (skin cancer). * Scales – Flaky skin produced due to rapid turnover of epidermal cells, common in psoriasis and dermatitis. * Erythema – Redness of the skin caused by increased blood flow during inflammation or infection. * Vitiligo – Loss of skin pigment due to autoimmune destruction of melanocytes, leading to white patches. * Cyanosis – Bluish discoloration of skin due to low oxygen levels, circulatory problems, or respiratory issues. * Ulcer – An open sore that results from skin breakdown, commonly due to infections, venous disease, or pressure. * Necrosis – Death of skin tissue due to severe infection, ischemia, burns, or trauma.