How to Stay Away from constipation is major concen......

All it depends on ur 

Healthier habits of Routine,Exercise, Diet, sleeping pattern, Day n night or long working hours (Sexual activity) n way of digestion influences as well.....

in short Ahar((Diet) Nidra(Sleep) n Bramhachyarya (Routine Behavioral Pattern.... ).... is the Authentic Tripod of Health n Fitness....

Common issues felt at anus if any has piles or allied condition...

constipation....may need to strain.. wait long at wash room

Hard/sticky consistency of fecal matter...

Burning pain.. 

Line of blood on stool or droplets of blood after passing stool... 

Itching at Anus n nearby area...

Boil or Recurring Boil n Purulent discharge n soiling of clothes n under garments.....

Kasharsutra and Ayurveda Approach is also one of best scientific method accepted by Moderns Surgical practitioners...