Prickly bump after a month of first electrolysis treatment?

I got electrolysis done on my chin/neck. After about 2/3 weeks later I thought it had healed so I thought it was just a closed comedones as I get those a lot, I tried to get it out but that didn't work and the area got inflamed. The inflammation is gone however I have a prickly dark bump which I cam cover with makeup but what could it be? I haven't gotten any other treatment since because I simply didn't have time.

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