How Do I Get a Bigger Masseter Muscle?

I would suggest discussing this with your physician, and then a well-informed and reputable provider prior to treatment. For a full review of potential side-effects and contraindications visit the website below.

Based on your photo's, it's difficult to tell exactly how much swelling there is, however from what you've described, it sounds like what you are feeling is typical. Botox can set up firm, then soften up. Give it up to two weeks and follow up with your provider if you need further clarification.

A small amount of Botox placed in the appropriate area of your forehead will help minimize the ability of that brow to climb...consult with a well-trained and reputable provider for your best results!

Botox works to relax the muscles where it's injected...if you are noticing a vein or "tighter" skin, it absolutely could be a direct result of the Botox injection(s). The smoother the skin, the easier to see underlying vasculature.

It's unlikely that it could be from Botox, unless alot ( >50  units ) were injected and deeply. If the symptoms don't resolve in 3-4 weeks, follow up with either the doctor that did the injection or a primary care physician.