Q-switched lasers are versatile medical and cosmetic devices primarily used for various dermatological procedures. Some of the procedures and treatments for which Q-switched lasers are commonly used include:

1. Tattoo Removal: Q-switched lasers are most well-known for tattoo removal. They work by breaking down tattoo pigments into smaller particles, allowing the body's immune system to gradually remove them.

2. Pigmented Lesion Removal: These lasers can target and remove various pigmented lesions, such as birthmarks, age spots, freckles, and sunspots.

3. Treatment of Melasma: Q-switched lasers are used to treat melasma, a condition characterized by dark patches on the skin, especially on the face.

4. Skin Rejuvenation: Q-switched lasers can improve skin texture, reduce fine lines, and even out skin tone, making them useful for skin rejuvenation procedures.

5. Acne Scar Reduction: They are sometimes used to improve the appearance of acne scars, particularly shallow scars and pigmentation caused by acne.

6. Nevus of Ota and Nevus of Ito Treatment: Q-switched lasers can be employed to treat these pigmented birthmarks on the face.

7. Lentigo Removal: Lentigines, or lentigo simplex, which are dark, flat, and benign skin spots, can be treated with Q-switched lasers.

8. Treatment of Cafe-au-lait Spots: These light to dark brown birthmarks can be lightened or removed with Q-switched laser therapy.

9. Port Wine Stain (PWS) Treatment: Q-switched lasers are sometimes used to manage port wine stains, a type of vascular birthmark.

10. Removal of Unwanted Tattoos: In addition to professional tattoos, Q-switched lasers can be used to remove amateur tattoos and permanent makeup.

11. Carbon Facial Rejuvination: Carbon Peel Laser treatments are similar to chemical peels, but they are easier on your skin and done with lasers.