Hi. I have several knots on the back of my neck above & below the hairline ranging in size from pea 2 quarter they all appeared within the past week some are tender some are not. I may be experiencing some blurred vision as well. I'm very concerned because in June of 2014 I was diagnosed with kidney cancer & had 2 have my right kidney removed. I'm praying that this is not cancer again. I have a Dr appt at the beggining of next week but was just looking for an experts opinion now. Any kind of help please thank u the site said free & I don't have a credit card but thanks anyway ugh I'm super scared