The claim that "excessive makeup is damaging to the skin" turn outs to be a false statement. In the article referenced there is only statement and there is no study to back up any of the claims bur as said, only statements. When you get to the premature aging section of the article it claims, "when worn for long periods of time, makeup clogs your pores and therefore limits collagen and elastin production on your skin." With such aa statement as is there is no evidence nor credibility to support the claims.
However, there are many articles that ask skin care professionals that say otherwise about makeup being harmful for the skin. The article "OK, Exactly How Bad Actually is Makeup for Your Skin?" written by Emma Hobday, goes into detail when asking Advanced Aesthetic Docter Dr. Sebastian Bejma and biochemist aesthetician Valerie Aparovich.The both of them seem to say that then main issue with this misconception is that "inadequate skincare prep, inadequate makeup removal, and using makeup products that are unsuitable for your skintype," are the most probable reasons as to why people struggle with it/ Aparovich continues to say "if you're applying and removing makeup correctly, then wearing makeup daily can't be treating your skin badly." Dr. Bejima goes into detail about what could be beneficial to take care of your skin, alongside the heavy recommendation of someone to wear sunscreen in order to hydrate your skin most effectively before applying makeup.
The article "Think Makeup Is Bad For Your Skin? We Asked Skin Professionals to Find Out," written by Verily Magazine, gives us more insight when it comes to the alleged negatives of wearing makeup. The article mentions three people they ask to see if there's any negatives to wearing makeup; the three come to the conclusion that it depends on your skin type, the type of product, and if the product is damaging, to try a new brand. Ariel Enriquez who is a Skin Trainer at Massage Retreat & Spa, says that it's important for his clients to double cleanse your skin when you're wearing makeup, and to never sleep in makeup. Dr Joel Schlessinger, who is a board certified dermatologist, completely agrees with the statement Enriquez made, saying it "can cause clogged pores, breakouts, irritation and rough skin texture... and bacterial buildup."
Both of the articles contain different people who are certified to be in the skincare field, and all of their statements come to the same agreements, its only unhealthy if it bothers your skin type and proper removal so your pores don't get clogged up; with the addition of proper skin hydration by wearing SPF sunscreen.
Source: Wait, is Makeup Actually Bad for Your Skin?
Source: Think Makeup Is Bad for Your Skin? We Asked Skin Professionals to Find Out - Verily