I had gynaecomastia surgery 2 weeks ago. Why is it not safe to travel? Can I wax the area yet?

Surgery Included both glandular removal via a cut under the areola and liposuction using 3 small cuts on both sides. I've been recommended to not travel for 6 weeks following the surgery, why is this? My next question is, I have a hairy chest and I'd like to wax the area. When would you say it is safe to wax the area? Bearing in mind the wax strip will also go over the nipple. I'm scared I might begin waxing too early and my nipples may reopen because of the vigorous pull?