Do or have something that gives one great pleasure: treat yourself—you ... To partake in an activity which no matter how detrimental to your health, allows you to enjoy yourself as much as possible. Did you treat yourself over the weekend? Are you treating yourself? Treat yourself as you wish others to treat you.

Yeah it basically means doing something you like or enjoy. Some examples: Later on I'm going to treat myself to a bottle of wine and a good movie. Person 1: Are you having dessert? Person 2: Nah, I'm trying to eat more healthily these days. Person 1: Go on, treat yourself! I'm going to Rome next weekend for a city break... you have to treat yourself every once in a while. Espero que sea de ayuda Carlos.