Pay attention, I'm only going to show you this once.

[Rei will have to deal with being shown off for a moment.

But Archer puts a hand on either side of her head from behind, thumbs resting over her forehead.]

You'll need to massage here [he indicates Rei's sinus area with his thumbs], here [again with Rei's temples with his fingers], and here [this time behind her ears]. Thirty minutes total, ten minutes per section, every few hours or so. It'll give her some relief.