How come I have yellow undertone skin tones on my stomach and pink undertone skin tones everywhere else?

Hard question to answer, tennisChick. Are you sure its not because you are looking down on your stomach and see the colour that way. Jaundiced (yellow) skin is a sign of liver dysfunction but it would be yellow all over you body if that were the case.

Do you have a problem with your kidneys or liver ?

Tick