Bad odor in the KITCHEN when taking a shower in the BATHROOM

HellFyre wrote:
Would this cause the smell to emanate from valve area instead of the drain in the sink? Because, as I responded to rexlion it doesn't appear to come from the drain. But if it's coming from this valve (assuming I have one) that the smell could be coming up from between the sink and stove, which would make sense.

Thanks!