Skin blemishes can be of different types, caused by a variety of causes, and each may require different treatment approaches. Here are the common types of skin blemishes and their treatment options: 

1. Melasma Melasma are dark spots that usually occur as a result of hormonal changes or sun exposure. Treatment options include the use of sunscreen, skin lightening products, chemical peels and laser treatments.
2. Sun Spots (Sun Freckles or Lentigo): Brown spots that appear on the skin as a result of prolonged exposure to the sun. Treatment options include chemical peels, laser treatments and cryotherapy (freezing treatment).
3. Post-Inflammatory Hyperpigmentation: Dark spots caused by acne, wounds or skin irritation. Treatment options may include topical agents (e.g. hydroquinone, retinoids), chemical peels and micro-needling.
4. Age Spots (Lentigo Senilis or Solar Lentigo): These are dark spots that appear with age. Treatment options include chemical peels, laser treatments and cryotherapy.
5. Legionella Melanocytic Disease (Legionella Nevus): This is a condition where large, dark patches appear in groups on the skin. Treatment options may include laser treatments, surgical removal and skin grafts.
6. Vitiligo Vitiligo is an autoimmune disease that causes white patches to appear on the skin. Treatment options include topical corticosteroids, phototherapy, skin grafts and depigmentation therapy.