<s>[INST] I have what looks like a smooth, soft, round, raised, black lesion, about 2-3mm in diameter on my inside cheek wall. It looks like a very smooth mole visually.  Not sure how long its been there but it can't have been more than a week, at the most.  Is it likely to be cancerous? [/INST] Welcome to Healthcare Magic.. The lesion you describe especially with such a short duration is unlikely to be cancer..  Probably it is a healing blood clot due to bite injury...  If it is symptomless you can observe it...  In case it is painful or persistent beyond a month then you visit your GP .. Hope this answered your query.. </s>