Jaw Botox - face down during a massage session

Ideally, you shouldn’t lie down after Botox, mostly because you want to avoid swelling and bruising by increasing blood flow to the injection areas. However, Botox tends to settle into the muscle within minutes. It’s highly unlikely that the Botox would migrate hours later. It takes about two weeks before Botox in the masseter works and even longer to see slimming of the face as the masseter shrinks, but then the effects last for approximately 6 months. Please find a board-certified dermatologist to do your touch-ups regularly so you’ll have continuous benefits.

Thanks
for the question. We caution all patients who are treated with Botox to avoid a
massage session for at least 24 hours after treatment, and to avoid any pressure
on the treated area for at least one week. We particularly suggest not laying
prone (face down) when facial treatments are done with Botox. In spite of that,
you are unlikely to experience an adverse result. However, only time will tell
for sure, and any adverse result should resolve within three months (and often
within 2-3 weeks). I hope this helps.

I typically encourage my patients to avoid any pressure or massage to the area for at least 4-6 hours after a Botox injection.  Having said that, it is likely you will not experience any complications. Your results should show in 1-2 weeks. If any complications do occur, you should schedule a follow up.