hi i had gone through your query and understand your concerns. i would come up with the possibility of HEMORRHOIDS OF 3rd degree is the cause for your sufferings.
straining at with increased intra abdominal and haemorrhoidal venous pressure in conditions like
-prolonged sitting and standing
i would suggest you taking Homeopathic
medicines gives safe and permanent cure for your piles complaints without any surgery along with management.
consult your local homeopathic physician for correct diagnosis of the case and remedy to fit your complaints
I hope this is helpful for you, thank you