Phew Pam - TG I never had no kiddoes, when a mom *always a mom! As it is I can enjoy em and hand em back...

Now, please impress on your son, that as this is a big ligament and soft tissue injury, he MUST take it easy on that ankle. Been there and done an ankle in - not funny. Ankles are notorious and take forever to heal. I*F not careful, will always have a wretchedly weak ankle, one that will keep on giving way...he don't want to go there!
Vit B is excellent in helping to promote healing. When in Germany, and had done that same ankle in, again, I was given a Vit-B injection to help promote healing. Sure did help. Was good.
So, run that one past your doctor. Vit-B injection. (Done in Europe but not here in the UK). Also, to be careful on blood clots - a few days of asprin will help in that direction. Recent article on ankle injuries and blood clots! Got to be V. careful - unfortunately, I didn't keep the article. But, will see IF I can find it.
Molly
Keping on Keeping on