Glow Library
Skin signals, decoded.
Cosmetic ingredients are an under-recognized driver of common skin symptoms. Each guide pairs a clinical overview from sources like the AAD, Mayo Clinic, NHS, and FDA with the cosmetic ingredients most often implicated — so you can pinpoint a likely trigger before it ends up in your cart.
Breast rash
What causes a breast rash, common cosmetic triggers, and the warning signs that mean you need a doctor now.
Read guideDark circles under eyes
Dark circles aren't only genetics. Some come from what you put around your eyes.
Read guideExcessive sweating (hyperhidrosis)
Hyperhidrosis is sweating past what your body needs to cool down. Glow doesn't treat it.
Read guidePeeling skin
Why your skin flakes off, when it's harmless, and when it's a sign something's wrong.
Read guidePetechiae
Petechiae are tiny non-blanching red or purple skin spots, almost always a medical sign rather than a skincare issue.
Read guideRed eye
Red eye is visible redness of the eye surface. It often looks worse than it feels, but a few causes are emergencies.
Read guideWatery eyes
Watery eyes have many causes. Cosmetic triggers like fragrance, lash glue, and retinol top the list.
Read guide
Glow is an ingredient research and safety-score app, not a medical device. Every guide here is for education — see a clinician for diagnosis or treatment.