Home all day long, do I still need to wear sunscreen? I currently use tretinoin micro gel.

Bottom line: best to use sunscreen daily. Clothing does let in UV light and there are several companies that make clothing that greatly decrease this amount. Quick dry and dry sunscreens should not leave you feeling sticky. Window films are rated by light transmission, heat prevention, and UV blocking abilities. UV rating is the most important for you (melasma) and there are films that block >99% of UV rays that are almost clear. Ultraviolet light has 2 major classifications of wavelengths: Ultraviolet A and B. UV B causes burns basal cell and squamous skin cancer and is blocked by glass. However UV A passed through and causes tanning, premature aging/wrinkling and age spots of the skin and increases the risk of developing Melanoma. Bottom line: use sunscreen whether windows or not. Generally a SPF over 30 is recommended. There are several powder sunscreens that work well. #wrinkleprevention#sunscreen#sundamagerepair

Hi Bobby Dan Steph. Ultraviolet light is ubiquitous and exposure happens even on cloudy days, through windows, etc. In other words, direct sunlight is not the only consideration. Sunblocks that protect against UV A and B rays are best, and should be used every  morning. I recommend patients apply their Retin A products right before going to bed at night. Tretinoin makes your skin especially susceptible, so be sure to apply sunblock regularly. Best wishes,