What to do with itchy skin? A small formula to get rid of itching. Medicinal vinegar therapy: 100 grams of bitter ginseng, add white vinegar and soak for 3 to 5 days. Dip a cotton swab into the liquid and apply to the itchy area, 2 to 3 times a day for 5 to 7 days. Foot bath therapy: take 10 grams of each of bitter ginseng, ringworm skin, snake bed seed, wormwood, red comfrey and windproof, decoct the juice and take a foot bath in a tub for 10 to 30 minutes twice a day for 5 to 7 days.