Earlier Today I Went To The Ladies Room And I

Earlier today I went to the ladies room and I noticed deep indentations on both of my shins. I was not leaning against anything - just was sitting at my desk before going to the ladies room. They have went away, but when I press my thumb on my shin, the indentation comes back and stays for a minute or so. Should I go to the emergency room? Could this be a sign of fluid build up (heart failure)?