My skin is usually combination, but also prone to being a bit dehydrated. I have a good routine and usually this fends off the dehydration (use hyaluronic serum, oils, moisturise, drink loads of water) but the past two days I am looking decidedly crinkled. My skin was even flaking yesterday, which never normally happens. I'm still oily along my T-zone. Not using any new products that could cause this sudden change. I'm baffled. Usually really good with skin! Does anyone know of something I buy quickly to sort this out?