What does an electrocardiogram measure?

An electrocardiogram measures the rate and rhythm of the heartbeat. It does this by measuring the electrical activity of the heartbeat over a period of time. It makes use of electrodes that are placed on the skin to detect the small electrical changes on the skin. 

There are a couple of answers.you could have an infection, a sti, std, or other problematic health issues.i would recommend going to the doctors, if not, take a shower and wash down there, then wait a couple of days, and if it’s still there, then is when you should go to the nearest or trusted gynecologist of your choice.