Thank you for the query.
Itching around the anus is most likely caused by hemorrhoids (especially that you have mentioned constipation
history). It does not have to be visible and no blood needs to be noticed.
is an antibacterial cream which at your case might be ineffective.
I suggest you to rather use prescription free hemorrhoids suppositories. You should also have sitz baths (can be with Quercus Cortex
), wash your anus after every stool. Increase fiber rich products and mineral water intake. Such treated hemorrhoids should go away in a week or so. If no, you should visit your doctor, have rectal examination
and consider colonoscopy
Hope this will help.