Constipation and incomplete evacuation.

I have been having constipation for the past few months. My stools are often small hard pellets / dry stools and I frequently feel incomplete bowel evacuation. Even after passing stool, I feel like some stool is still left behind and rectum does not feel fully cleared. Sometimes I have the urge to pass stool but it does not come completely. I noticed that squatting helps me empty better compared to sitting on a western toilet. I have increased water intake to around 3 L/day and diet is normal / controlled, but symptoms are still continuing. Main symptoms: * Hard pellet stools * Incomplete evacuation * Feeling of retained stool after bowel movement * Ongoing for months despite hydration changes Would like evaluation for cause of chronic constipation and incomplete evacuation.