A couple of weeks ago my front crown became loose and my gum around it was very sore. I was also feeling a little sick with urso. I stopped taking my evening dose of urso for about 2 weeks and my gums cleared up. On monday thought i'd better start taking the evening dose of urso again. Low and behold, woke up this morning with a huge lump on my gum. I'm sure urso is causing me a problem. Does anyone else have problems with gums.