Treatment intervals for use of compositions comprising energy absorbing materials for dermatological applications

A method of at least one of treating a follicular disease in a subject, the method comprising:

• a. a first phase of treatment, said first phase of treatment comprising:
• i. topically applying a first formulation comprising plasmonic micro or nanoparticles in a hydrophilic solution to a subject's skin of a face or an upper trunk, said first formulation having an optical density of between about 5 and about 500;
• ii. mechanically agitating said first formulation on said skin to facilitate delivery of said micro or nanoparticles to at least one of the group of a hair follicle, a sebaceous gland, a sebaceous gland duet, and an infundibulum of the skin;
• and
• iii. irradiating said micro or nanoparticles with light having a wavelength between about 700 and about 1,100 nm that is absorbed by said micro or nanoparticles, thereby heating said skin local to said micro or nanoparticles for at least one of treating the follicular disease;
• and
• b. a second phase of treatment, said second phase of treatment comprising:
• i. between about 23 hours and 14 days after said irradiating step of said first phase of treatment:
• a. topically applying a second formulation comprising said micro or nanoparticles to said subject's skin, said second formulation having an optical density of between about 5 and about 500;
• b. mechanically agitating said second formulation on said skin to facilitate delivery of said micro or nanoparticles to at least one of the group of a hair follicle, a sebaceous gland, a sebaceous gland duct, and an infundibulum of the skin;
• and
• c. irradiating said micro or nanoparticles with light having a wavelength between about 700 and about 1,100 nm that is absorbed by said micro or nanoparticles, thereby heating said skin local to said micro or nanoparticles for at least one of treating the follicular disease.