Earache

Caused sometimes by bad teeth, but generally by cold or hardened ear wax.

Hold ear over cloth wrung out of hot water, on which are several drops of alcohol. Syringe ear with warm bicarbonate of soda water — 1 tsp. to a cup; or peroxide of hydrogen water — 1 tbsp. to a cup of water.

One drop laudanum, or one drop arnica to three drops very warm olive oil, dropped into ear with a medicine dropper, often relieves pain; or cotton may be saturated with the warm olive oil and placed in the ear and covered with dry cotton. To prevent hardening of wax: keep ear anointed with ordinary red vaseline (unbleached vaseline). For watery discharge of ear, dust with dry boric acid.

Source: The Mary Frances First Aid Book, Jane Eayre Fryer