Could use expert help with why i have these painful hemorrhoids?

Water, diet, walking: Hemorrhoids are a common problem, which result from increased pressure in the veins of the anus causing the veins to swell, making them itchy and painful (especially if the hemorrhoid clots, also known as thrombosis). The pain is from stretching the lining of the anal canal from the engorged hemorrhoids. Treatment is directed at treating the underlying cause for hemorrhoids.