There is no way to say for certain. Could a pimple like lesion be a recurrence? Yes. Is it likely? No. Something like that could be scar tissue, hair follicle or an internal stitch – or even dare I say it, a pimple. 🙂 In reality, most people don't recur locally although some do. If it continues to change for the worse, then it is of concern. If it starts healing on it's own, great!
Regrowing pigment is always a concern, but not a given that it is melanoma. For instance, I have a ton of freckles on my back. I also have several WLE scars from atypicals and melanoma. I have pigment growing thru some of them. If a freckle is bisected on a WLE, it isn't uncommon for it to grow back on both sides and/or thru the scar. I have pigment there but it has stayed stable. I've also had pigment grow through scar tissue from knee surgery and I don't have much in the way of freckles on my knees.
Lumps under the skin between your scar and the nearest lymph basin can also be of concern. This could indicate melanoma in the lymph channels heading toward the nearest lymph basin. Again, not all lumps are melanoma. Stitches, scar tissue, cysts, ipomas (fatty tumors – common) and other benign things can cause lumps.
Enlarged lymph nodes in your nearest lymph node basin can be concerning too – especially if your surgery isn't recent. But again, not a given as lymph nodes swell for trauma, infection and other unknown reasons.
Bottom line is we are unique and it isn't easy to diagnose over the internet. Best thing to do if you are concerned about something is see your doc.
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