Why Post Inflammatory Erythema Persists
Post inflammatory erythema, or PIE, shows up as red or pink marks on the skin after inflammation like acne heals. Unlike dark spots from post inflammatory hyperpigmentation, PIE comes from dilated blood vessels and extra blood flow in the area that stick around longer than expected.
When skin gets hurt by acne, bug bites, rashes, or harsh products, it sends out signals to fight the problem. This ramps up inflammation, which makes blood vessels widen to bring in healing cells. In some people, those vessels do not shrink back right away, leaving red patches that look like the original breakout never fully went away.
Skin type plays a big role in why PIE hangs on. People with sensitive or reactive skin have quicker and stronger inflammatory responses. Their skin barriers often let irritants in easier, sparking more blood vessel activity that lasts. Genetic factors also matter, as some folks inherit a tendency for slower vessel recovery after flares from eczema, hormonal acne, or ingrown hairs.
Sun exposure makes PIE worse and longer lasting. UV rays hit the already sensitive area, triggering more inflammation and keeping blood vessels open. Without daily sunscreen, even healed skin darkens or stays red far longer.
Hormones add to the issue too. Androgens from monthly cycles boost oil and inflammation, leading to breakouts that leave stubborn red marks. Past skin trauma, like from strong peels or lasers, can prime the area for repeat PIE if not handled gently.
Healing takes time because the skin needs to rebuild its barrier and calm those vessels. On average, marks fade in months, but picking at skin or new irritation restarts the cycle. Consistent gentle care helps speed things up by cutting inflammation at the source.
Sources
https://worldofasaya.com/blogs/skin-types/3-skin-types-most-prone-to-post-inflammatory-pih
https://www.lmaclinic.com/lma/blog/co2-laser-for-post-inflammatory-hyperpigmentation
https://artofskincare.com/blogs/learn/how-to-treat-post-inflammatory-hyperpigmentation-at-home
https://doralhw.org/acne-treatment-beyond-topicals-when-to-consider-professional-procedures-2/
https://www.shumailas.com/conditions/post-inflammatory-hyperpigmentation-pih/
https://potozkinellis.com/facial-vein-and-redness-treatment-danville/
