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Hello,I am Dr. Arun and will be helping you today.
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A sore cyst of few days duration is likely to be;
1) Boil; it will need a course of antibiotics.
2) Infected sebaceous or dermoid cyst. This too may resolve with the antibiotics but recurrence may occur. So will need removal, which is an office procedure under numbing medication.
You may apply Betadine to control the infection and soreness.
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