Terrible itching and swelling at old melanoma surgical scar

I had my initial wide excision 8 years ago in April. Then another one at MD Anderson Cancer Center a few months later. Every once in a while, it begins itching at that site, but rarely but this past several days it has been driving me nuts and in asking hubby what is going on back there (I can't see well in the mirror), he said there is a ridge of swelling and it is red (since I ask him every few minutes to scratch it, that may be the reason for the redness). However, the itching, day and night, is driving me crazy.

I had my initial wide excision 8 years ago in April. Then another one at MD Anderson Cancer Center a few months later. Every once in a while, it begins itching at that site, but rarely but this past several days it has been driving me nuts and in asking hubby what is going on back there (I can't see well in the mirror), he said there is a ridge of swelling and it is red (since I ask him every few minutes to scratch it, that may be the reason for the redness). However, the itching, day and night, is driving me crazy.

This is how I first found my initial melanoma lesion….it was either a mole I was unaware of or a mole that popped up at that site suddenly but it itched like mad. I spent a lot of time brushing against doorways to scratch for a while, until I finally went to the doctor for what turned out to be a cracked rib (from simply bending over to pick up purse) and had him look at my itching mole.The mole was removed  immediately and I got the word the next day that it was melanoma. It turned out to be deeper than thought and had spread to 5 nodes (three filled with melanoma and two with micromets). Thank God it was caught in time and I have the cracked rib to thank for that!  The rest is history. I went to MD Anderson Cancer Center where the metastasis was caught in time and I have been doing very well.

Okay, getting wordy here. My question is this:  Could this be MORE melanoma presenting at the scar site after all these years? Why would an old scar begin swelling and itching so badly? Anyone else have this happen?

Of interest is that I just had my scans and all a couple of weeks ago. Another year of being NED. I do have an appointment with a dermatologist at MDA in May to look at a site of interest on face (looks like age spot and likely is) and do an overall exam, and was told that this was the first available appointment. Should I call the Mel and Skin Center at MDA if this itching and swelling continues and see if I can get in on an emergency basis? Taking an antihistimine does not help with the itch and I hesitate to put anything on it. It is NOT a bug bite.

Any thoughts or advice will be greatly appreciated. By the way, I think I like the changes here on this site, but it took me by surprise. I opened a new account under GiniaJM but am formerly Jeannie in Texas, as my longtime friends here know me as. Hello all!