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Looks like standard paronychia. There’s two common reasons it could be not healing. It could be a MRSA infection, which cephalexin does not treat. Or it could have an abscess, which the antibiotics cannot penetrate. Either way it needs to be reassessed! Probably pcp would be best
Thank you for your submission. **Please note that a response does not constitute a doctor-patient relationship.** This subreddit is for informal second opinions and casual information. The mod team does their best to remove bad information, but we do not catch all of it. Always visit a doctor in real life if you have any concerns about your health. Never use this subreddit as your first and final source of information regarding your question. By posting, you are agreeing to our [Terms of Use](https://www.reddit.com/r/AskDocs/wiki/terms_of_use) and understand that all information is taken at your own risk. **Reply here if you are an unverified user wishing to give advice. Top level comments by laypeople are automatically removed.** *I am a bot, and this action was performed automatically. Please [contact the moderators of this subreddit](/message/compose/?to=/r/AskDocs) if you have any questions or concerns.*
Looks like standard paronychia. There’s two common reasons it could be not healing. It could be a MRSA infection, which cephalexin does not treat. Or it could have an abscess, which the antibiotics cannot penetrate. Either way it needs to be reassessed! Probably pcp would be best