 [ Symptoms ] how does retinyl propionate compare to retinoic acid retinaldehyde and retinol for treating wrinkles and skin sagging [ Disease ] sometimes it can be hard to get used to being healthy this could be something as simple as having trouble with your digestion try eating some greek yogurt getting more fiber and exercising some every day and see if that helps if it does not help or if your symptoms get worse a visit with a doctor is in order by the way gas can also cause spasms as can withdrawal from some of the drugs you were taking colon cancer is always a possibility for all humans but in this case i would consider it to be less likely than simple gas from difficulty with digestion