Yag Laser Treatment - Venous Malformation (Tongue, Lip, Cheek, Palate, Neck)? (photo)

I have a very large venous malformation that comprises a good portion of the right side of my face/neck/tongue. I am having a Yag treatment(s) performed on the areas that he can get to - which are the lower inner lip, tongue, inner cheek, palate and neck (This is the first part of a multi-prong treatment). My question is - how much swelling/blistering is common? I am a little worried about my tongue becoming too swollen to breath or swallow. I am fine with the other parts. Thanks in advance.