Male - could this be LS ?

Hi, hope you can help. I’ve had this issue for going on 5 years now. The symptoms started and lasted about a year at first, they have come back a few times for not as long over the last 5 years. The last one was back in october and lasted until about a month ago. I had two weeks of feeling great and then its back again. It’s a never ending redness (but when a derm doctor sees it it looks fine) and burning feeling on the head of the penis and foreskin (thats my biggest pain). I’ve had every test i can think of and tried every cream going. They just seen to make it feel worse. The good thing is it has gone away in the past but it takes a while. not sure what is best to do??? i dont think i’ll get to fine out what this actually is. This is what makes me worry about it being LS. The skin colour has gone in many parts of my genitals over around 2 year period. All everyone says it that is just vertiligo and not linked. but it started happening as the pain started 5 years ago. what do you think.