Sometimes people get skin issues, such as acne, rosacea, eczema, etc. Tony Pantalleresco has good information in his video about dealing with that.
He says to take a glass bottle (I used a 750 ml bottle, like a wine bottle), add vinegar (such as distilled vinegar) to about two-thirds full, add some iodine (maybe 20 drops), and then add some salt. Shake the bottle to mix it all up (with the bottle cap on), and then pour out onto a suitable cloth, put the cloth with this mixture onto your skin, and keep doing it each day until the skin problem clears up.
Here is the video: