@fazio25
Actinic keratosis (AK), also known as solar keratosis, is a common precancerous skin condition caused by prolonged exposure to ultraviolet (UV) radiation from the sun or artificial sources.
Symptoms:
Rough, scaly, or crusty patches of skin
Typically found on sun-exposed areas, such as the face, scalp, ears, neck, and back of the hands
May be pink, red, or skin-colored
Can sometimes feel itchy or tender
Causes:
Chronic UV exposure, especially during childhood and early adulthood
Fair skin, light hair, and blue or green eyes
Certain medications, such as immunosuppressants
Diagnosis:
Visual examination by a dermatologist
Biopsy may be performed in some cases to rule out other skin conditions
Treatment:
Topical treatments, such as creams containing salicylic acid, 5-fluorouracil, or imiquimod
Cryotherapy (freezing the lesions)
Excisional surgery
Photodynamic therapy (light therapy)

SK's or seborrheic keratosis is a common noncancerous (benign) skin growth. People tend to get more of them as they get older. Blue light doesn't affect them and Medicare does not cover their removal. They are like a barnacle ! I self pay for their removal. AK's are pre- cancerous and SK's are not.

@fazio25
Actinic Keratoses