I admit that I easily feel guilty when I indulge myself. Not so much on the food side - I did grow up in a food culture and don't feel particularly guilty about some wine and chocolate here and there. But when it comes to massages, pedicures, meeting friends for drinks or lunch, an hour of slow yoga in the middle of the day, just treating myself in general, I tend to feel a bit guilty about spending money on "frivolous" things. But it is the frivolity, that it is unnecessary and special, that makes such occasional treats so worthwhile.
Whether it's an hour of reflexology, paint night (one of those wine & art events), or anything else that let's you know how much you appreciate yourself, is good for you. The pleasure of feeling good about yourself, about feeling pampered and taken care of, is very soothing. You are totally worth it!