While each product featured is independently selected by our editors, we may include paid promotion. If you buy something through our links, we may earn commission. Read more about our Product Review Guidelines here. Selma Blair has been a Hollywood mainstay since the late ’90s, with iconic roles in “Cruel Intentions,” “Legally Blonde,” and “Hellboy.” But in the years since becoming a mother and being diagnosed with multiple sclerosis, Blair has faced a different kind of challenge: caring for her skin. After her son was born in 2011, Blair’s skin became more reactive. Dermatitis, rosacea, and painful boil-like flare-ups sent her on a months-long search for answers, bouncing between dermatologists,…