keratosis
"I was on Fluorouracil two times a day for two weeks. It wasn't too bad for the first 10 days then it continued to burn more with every application.  

The most painful part of the Fluorouracil treatment was after I completed the applications. A nurse recommended that I mix %u2153 cup of white vinegar with 6 cups of water and place the mixture in the refrigerator until chilled. Then, use a very soft wash cloth and the vinegar solution to cleanse my face.  She also said to take the damp wash cloth and place it over my face for 15 minutes 4 times daily. 

Contrary to what I thought, the vinegar solution did not burn, it soothed incredibly."