Alum Powder
You can purchase some alum powder anywhere in the spice or baking section in a grocery store. This ingredient contains some special components that might help shrink the tissues of mouth sores. More importantly, it would stimulate your immune system and speed up the healing process. To apply alum powder, you need to pour it out on a spoon. After that, dip a cotton swab in the water and then in the alum. Directly apply the cotton swab on the mouth sores and leave it around 1 or 2 minutes before rinsing out with water. You should do it one to two times per day. Do not freak out if you swallow alum powder as it is often used in cooking and baking. [4]
