Wei Wuxian smiles at him, then winces a bit as the comb hits a tangle near the nape of his neck. Carefully, he wrangles the teeth through the knotted hair, smoothing it into place as the tangles give way.

(Yes. He definitely needs to remember to eat, and to take care of himself a little better, if only so Lan Zhan will not have to fuss so much.)

Once he's done, he holds the comb out to Lan Zhan.