My husband has has just had a heart attack 2 weeks ago and is home now but I have noticed that the veins under his tongue are very dark. Could that be circulation related? Should I take him to the doctor in the morn? YYYY@YYYY MiriamAustralia
Here as you describe it, I would like to rule out what we call central cyanosis, which means that circulation is not adequate.  You may check his oxygen saturation thorough a non-Invasive device called pulse oximeter (available for 15-20 dollar s) or your doctor s place and do consult your cardiologist if less than 90%.  Regards Chat Doctor.