Keeping tabs on it is a good idea.

The first place to check, the outlet suggests, is underneath your eyelids.

Another easy-to-spot place to look isyour skin.

Woman getting a massage

The outlet reports that your skin tone should be a giveaway as to how your circulatory system is functioning.

If it takes a few seconds for your skin to look normal again, your circulation may be suffering.

Woman holding her foot