Vacation doesn't stress me out. Daily life does.
Sun and a tank top doesn't tense my shoulders, a suit jacket does.
The idea of a massage on vacation is glamorous. It also costs twice or three times as much. For the past year and a half I've been getting a massage every month. $55 for 55 minutes. 5 minutes from my house and a therapist who does a great job. And if you're willing to try promotional offers at different spas and go grouponing, you could probably pay less than that.
Caveat: If you're in Thailand where an hour long foot massage is $5 and a Thai massage on the beach is $12 - go for it. Every day.
Unless your massage is on the beach with the sound of waves, you are lying on a table in a dim room with your eyes closed. You can lie on a table in a dim room in your home town. Why pay a premium to do it at a hotel? Use that $50-100 difference and treat yourself to a special dinner, a zip line tour or a street market splurge.
Then schedule a massage at home the day after your vacation ends. Keep those good vacation vibes going after you return to reality.