They say drink coke acts like stomach acid to dissolve if not serious block
Or a cup of brewed coffee can also help. I have a colostomy for about 5 years now and periodically I get constipated, I'll go a day or even two with no stool; but this was the 'norm' for me all my life. But if nothing by the third day I get about a 12 ounce cuppa, (like Starbucks since we only use instant at home) and even though I drink it white with lots of cream, it will unblock me within a couple hours. Better I think than taking chemical laxatives.