Gas drops did this to my baby’s skin

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Edit: her paci was not there until I took the picture so she would stay calm and still. It didn’t even touch the area because I held it sideways.

I gave her simethicone gas drops and it leaked out of her mouth while I was changing her diaper and i didn’t get a chance to wipe it away because my hands were dirty and when I did wipe it away it did this.

She’s only 6 weeks old. Have you guys dealt with this?