How can I quell this headache

Hint 1 of 5:

Check around in the room.

Hint 2 of 5:

Search the bathrobe.

Hint 3 of 5:

It might be easier if you wore the robe.

Hint 4 of 5:

Check in pockets of the robe.

Hint 5 of 5:

Take the bufferin.