Oil Pulling and severe cracks in corner of mouth

Hello, I have been oil pulling on and off for years. I love the results I get from oil pulling such as whitened teeth, nice skin, and I feel overall better. But everytime I oil pull for more than 2-3 weeks straight I develop extremely painful cracks in one corner of my mouth, it always starts on the right side and one time after I continued to keep oil pulling it developed on the left. It looks exactly like pictures of angular cheilitis that I saw on google images. I just can't figure out why everytime I oil pull this happens. It is such a mess to try to clear the cracks up and they hurt so bad! I was wondering if anyone has any insight as to why this happens and any ideas on how to clear this up quicker. Thank You,

Bethany