Our neuromuscular doctor, Brenda Wong, and her amazing team see DMD patients from all over the world...so they have lots of experience in every area of DMD. When our son started having motor tics a couple of years ago, we requested her input. She let us know that the team does see motor tics in both their general neurology clinic and in their Duchenne clinic. If the tics are not disrupting social or school functioning, the team doesn't do anything, as most times the tics wax and wane and minor counseling of parents/care providers and patients is all that's needed to take care of them. We've found her advice to be true - our son's tics do come and go, and while there, we don't make a big deal of it. Sometimes, we'll casually let him know that they're happening, he'll become aware of them, and the tics will drop off for a while. Sometimes they just go away of their own accord. They do come back, but are not affecting him adversely.
Yay for them going away! :) I hope they stay away for good. Yeah it was worrisome to me too when tics began in our son, but we breathed a sign of relief after talking with our brilliant physician who treats hundreds of Duchenne patients a year. We love our doc ;)