Hi.. Welcome to HEALTHCARE MAGIC.. I have gone through your query and can understand your concerns.. As per your complain I have taken your complete medical history along with your present medical problem of unable to evacuate your bowels regularly and when you do then also there is no complete evacuation and the condition is heading towards Constipation.. Burning and pain during bowel movements seems te be due to causes like either formation of an ANAL FISSURE that is a tear in the anal mucosa due to hard stools and excess straining during bowels.. Another cause can be formation of Hemorrhoids or Piles that occurs due to inflammation of vein in anal canal leading to the symptoms of pain and burning.. Consult a Proctologist and get evaluated and he can also advise you anoscopy for confirmation of diagnosis.. In case of anal fissure you can be advised to apply topical anaesthetics like Lignocaine gel.. Calcium channel blocker containing ointments like Diltizem can be advised as it will dilate the blood vessels in the area and improve blood flow that will initiate healing.. You can be advised to take stool softeners like Docusate and increase fibre intake that will also smoothen the stool like Psyllium and methylcellulose.. You can also do Sitz bath by sitting in a tub of warm water 2 to 3 times a day especially after bowels.. You can also take painkillers like Ibuprofen if there is pain.. In case of no resolution surgical treatment can be advised.. In case of Hemorrhoids along with Sitz bath and taking high fibre diet and stool softeners you can also be advised a combination of steroid and blood vessel shrinking medication like Phenylephrine.. Numbing gel like Lignocaine can also be advised.. Doing cool compresses will also help.. In case of no improvement surgical procedures likeRubber band ligation, sclerotherapy or hemorrhoidectomy can be advised.. Hope this information helps.. Thanks and regards. Dr.Honey Nandwani Arora.