Hickey or "pimple"

I went to my grandmother's for the day with my kids to let my husband stay home and get a break from everything. I literally spend all day there and come home to him saying he popped a "pimple on his neck" I looked cause he gets really bad cystic acne and I see what looks like a hickey. He's says I'm crazy but to me it looks like a light hickey. Keep in mind there was no bump underneath the skin. It was smooth. Please tell me I'm not crazy

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