Hi there,
Thanks for your query.
Firstly, the inner lining of the anus/
rectum is very very delicate. The tube might have caused bruises, which will take some time to heal. Since, you did not have any bleeding, the bruises are apparently minor (something like a razor-cut on the skin).
If you had indeed used a medicated
nebulizer, the medication had apparently irritated the inner lining due to its corroding nature.
In either case, nothing needs to be done. Avoid constipation; take plenty of water; avoid straining. It will take its own sweet time to heal.
Consult your doctor if the pain persists for more than 3-4 days; or, if bleeding occurs.
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Fond regards and have a nice day
Dr. Rakesh Karanwal