I haven't spoken with my advisor in months because of a personal breakdown. How do I reestablish contact?
It should be enough to explain your absence with &quot;I've been ill for several months, but am better now&quot;. You don't really need to go in to details. If asked, just reply that it is very &quot;personal&quot;.
The professor may need some assurance that you will be effective going forward, but really has no need to know details.
And, of course, you should say you've been somewhat (at least) productive in the interim.
And keep contact with the professional counselor through any necessary transition.