Hemorrhoids. Are the timing of my work.

I have anal swelling for the last 30 days.. No pain no bleeding.. The first swelling was less but now it is more... It started after my 300 km bike ride... And after the bike ride Diarrhoea started . I went to Gastroenterologist for this condition as I have IBS too....he prescribed me an IBSET (ramesteron hydrochloride tablet) tablet ... but for swelling in anal he only prescribed annovate cream which is not helping me... As of now I am taking ibuprofen and paracetamol for swelling.. But its hardly helping me... Please find the attached images... Sorry for gross images in advance...in one image after passing the stool my doctor has asked me to apply cream.. And one is in a day time image...i am very uncomfortable while sitting on chair and my job in IT field so I usually have habits of sitting on a chair for 10 to 12 hours not continues but yes these are the timing of my work...