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The small pea size lump is most likely to be an infected cyst or furuncle. This is unrelated to the haemorrhoids you have. Since the pus has been drained, healing should take place naturally. Generally no treatment is required, but in your case I would recommend applying a local antibiotic cream. This is because a complication can lead on to ruputre of haemorrhoid due to its proximity.
You can apply an antibiotic ointment like Betadine ( Povidone Iodine ) which is OTC and should be easily available. It might not be easy for you to get an antibiotic ointment meant for anal fissure/fistula - so Povidone Iodine will be a good choice. Apply it twice daily. Do not apply into the anal canal. Just apply twice daily.
As with the haemorrhoids - do not strain, have a high fibre diet (make sure you are not constipated). This should heal without any issues.
Later when you are back a definitive treatment of haemorrhoids can be considered.
Hope this helps
Patient replied :
Thank you very much for the prompt reply. I have just returned from the pharmacy prior to reading your answer and I have bought fusidic acid 20mg in a cream base along with isopropyl alcohol wipes.
Are these also ok to use close to the anus?
Hello, you can use fusidic acid 20mg, as it is also any antibiotic. You can use the wipes too. Like I mentioned earlier, apply it twice daily. Do not apply it into the anal canal.
Make sure you wash your hands well before application to avoid further infection.
Hope this has helped.
Get well soon.