Thanks for your query.Based on the facts that you have posted it appears that you have chronic kineny disease form childhood and treated with steroids
Now you have problem of bleeding from anus and has been diagnosed to have Fissure in anus
Please ocnsult qualified General surgeon
for clinical and digital proctoscopic examination to rule out presence of Haemorrhoids.(Piles).
In the mean while Please take diet rich in vegetables and fruits with plenty of fibres to soften the stools .
Use topical soothing local anaesthetic
ointment like Nupercaine for local application.
Take stool softener
like Isabgol to soften the stools.
Further treatment will be decided by a general surgeon.