Today I put a post on Facebook that said:  

Dry skin is lack of ‘oil’….. dehydrated skin is lack of ‘water’. 
People can have oily skin, yet be very dehydrated! 
If you have oily skin... it's best to use an (oil free) moisturiser daily... to prevent dehydration (ageing)

Then someone asked "How do you tell the difference?".

So....  Here is my explanation.

Dehydrated skin indications:    

• dull colour
• uneven texture
• fine lines
• sun damaged
• can be irritated, flaky and feel tight
• loss of elasticity 

What causes Dehydration?  

Our skin is made up of 70% water.... so it is quite easy for skin to lose a good deal of water hydration ............