It is interesting how many of these have a basis in fact. A few drops of urine in an ear ache will draw out the fluid build up behind the ear drum. Urine is sterile (usually) when it is fresh, but sweet oil drops will do the same thing and don't have the yuck factor. Dog wood bark was used by our native Americans for many things because it contains a natural form of aspirin. I have used tobacco juice on a wasp bite many times, the nicotine is a pain reliever, and is one reason man old folks chewed it, to relieve the pain of a bad tooth, or a mouth full of them. a whole clove will also reduce the pain of a tooth ache. Elderberry wine is good for old horses and old men because it contains a heart drug we use today. Putting a chicken breast on a snake bite is like another remedy, putting a piece of liver on the snake bite. that was the basis of the story the Yearling bu Marguerite Rawlings. The daddy got bitten by a cotton mouth (I think, maybe a cane break rattlesnake) and he killed a doe with a fawn to use the liver to take the poison out of the bite. Daddy survived, the boy got the fawn. Cob webs do stop bleeding, sugar will keep a cut from getting infected. A past of baking soda let to dry on poison ivy will draw out the poison and dry it up. I have not heard of adding the coffee, but the caffeine might be a vaso-restricter.
There are a lot of old remedies out there that work, there are a lot that don't, and a lot that hurt more than cure. I tend to trust my Dr. rather that the old granny woman.

Let us cross over the river and rest in the shade of the trees
Stonewall Jackson
Hug your loved ones often, Life is short even on its longest days.
I don't see the glass as half full or half empty. I just finish it and order another.