Itching bleeding burning in lower abdomen can be due to IBS OR IBD. AND same SYMPTOMS in anal area can be due to piles fissure and other causes. If u have even little bit hard stools than that is the cause of the SYMPTOMS. Resulting in piles or fissure.
Ibs is very difficult to completely get cured. Same is for constipation.
Next Steps
discuss with more details about your SYMPTOMS. some specific histories are needed in addition.
Health Tips
For your IBS as well as constipation if any, plant based diet is the ideal diet with amazing benefits.