I am curious to know how you are certain the discomfort you are feeling is from the liver. Are you a liver-ailment patient already, so you know it when you feel it? I ask because five days is a very short time to feel any side effect, and I was going to say, no, of course this is not liver damage from the pills. But if you have a challenged liver such that you know from the way it feels if an ache or pain in the area is the liver, then maybe it is possible. However, that said, liver damage is not one of the side effects listed for Ganoderma lucidum. Are the pills from a trustworthy source?