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Thank you for your question.
I am Dr Saha, I shall try my best to help you.
I feel he needs an examination by doctor asap.
The black area can be due to lack of blood circulation or dead tissue.
As it is rapidly getting worse, I would suggest to get an examination in ER.
Tylenol can be taken for pain.
I hope this information helps.
If there’s anything else I can do, please let me know.
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