Normal, healthy volunteers without any skin pathology will be asked to undergo various procedures to evaluate their sleep and skin health.

Volunteers with skin pathology including but not limited to eczema, psoriasis, acne, and other inflammatory dermatoses will be asked to undergo various procedures to evaluate their sleep and skin health.

The volunteers may be asked to wear a wrist actigraph to measure movement. This watch would be worn for 24 hours per day for 7-14 days. The volunteer may also be asked to fill out questionnaires regarding their sleep patterns. Note: Other methods of assessing sleep patterns may also be used including a portable polysomnogram or a standard, overnight sleep study.

The volunteers may have their skin evaluated for skin aging using the SCINEXA tool. Volunteers with psoriasis may have their skin evaluated via PASI and/or PGA assessments. Volunteers may have photographs taken to compare clinical appearance with laboratory and research findings.

Skin, blood, urine, saliva and hair follicle samples may be collected from some volunteers to look at various markers related to sleep, the circadian rhythm and skin disease.