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You are suffering from constipation
. Do not be Panic.
Here are some tips and treatment to subside your worrying symptoms.
Start on with Syp.lactulose
10ml twice a day as it soften stools.
Pain is due to fissure/crack in anal region developed due to starting of hard stools.
Pain is reduced by Lignocaine jelly for applying in anal region before and after defecation.
I advice you to do SITZ Bath half hour before passing motion as it dilates blood vessels and improve healing process.
I Hope I Provided Useful Information. Do ask Furthur Questions to help You get well soon.
Dr.J.Kingson John David