You have healthy, normal skin but sometimes it feels tight or uncomfortable.  This is usually caused by dehydration, or lacking enough moisture in your skin.  This could mean a damaged barrier to the surface layers of your skin where there is transepidermal water loss (TEWL).  Often this is from using products which are just too strong for your skin type.  Everything you choose should be calming and gentle on your skin.

Are you drinking enough water? 
You may be getting your eight glasses a day, but that doesn't mean that water is going to your skin.  Matter of fact, the skin is the last organ to get that water. Keep drinking the water but make sure you are including humectants in your skincare program.  Humectants are water loving ingredients like glycerin and hyaluronic acid.  These ingredients grab on to water and hold it in the skin. You need to follow up with a vitamin based emollients (like vitamin E) to seal in that moisture and act as a soothing antioxidant. Regular exfoliation with a time released acid with help remove those dead, dry layers while revealing a newer, fresher layer of skin.