If a 'stone' is stuck, either you can actually 'feel' it or your stools will be very pale yellow to tan (Obviously VERY pale.)
By 'feeling' it, by far the most often is a sense of heaviness or fullness in the upper central area of the abdomen, right below the sternum usually slightly to the right, but sometimes to the left. Occasionally, the heaviness is accompanied by a distinct 'twinge' or discomfort, sometimes even a feeling of having eaten too much although you haven't. VERY rarely (and I do mean VERY) a sharp pain in the same area is felt.
In any of the above, the FIRST thing to do is to take a dose of Epsom Salts : 3/4 to 1 Tablespoon Epsom Salts to 1 cup of either water or apple juice. Drink 1/2 cup of the mix and wait about an hour. VERY gently massage the area from the upper outside region down toward the center. Some people have found doing sit-ups or crunches helps, but even curling up in an easy chair or laying down with your legs drawn up can help, too. (I personally like the gentle massage technique.) After 30 minutes, you may want to drink a glass of water to keep from being too dehydrated by the action of the Epsom Salts . If after an hour the discomfort still exists, drink the second 1/2 of the dose.
If another hour after the second dose you still feel or believe a 'stone' to be 'stuck,' try a second flush by doing another 1/2 to 3/4 Tablespoon of epsom salts in 1/2 cup water or juice followed an hour later by one dose of the olive oil and grapefruit juice mix. Follow the directions of 1/2 cup olive oil and a 1/2 cup grapefruit juice, drink the mixture and lay down. Again, the extra gentle massage technique helps.
In the vast majority of cases, the first extra dose of epsom salts is all that's needed.