Gut problems while on steroids

I am currently on prednisolone for a second attack of PMR after 10 years free of it.
After 18 months on prednisolone, I started to have gut problems, loss of appetite, intermittent constipation and diarrhoea, several colonoscopies and finally an abscess leaking into my peritoneum with an emergency ileostomy and a stoma. The stoma was successfully reversed, but I quickly developed a post-incisional abdominal hernia. Since the operations, I have had a very good diet with very regular and normal bowel habits.
However, despite having made no changes in my diet or lifestyle, I have recently started to exhibit the same symptoms of intermittent constipation and diarrhoea.
I'm wondering if there is any evidence of a link between PMR and or long-term Prednisolone.