 [ Symptoms ] my dad has stage 4 colon cancer with mets to the liver he stopped chemo 8 mo ago now having severe constipation prob he quit chemo because his body couldnt take it anymore my dad was taking milk of mag for 2 years as well as 4 stool softners a day  his major complaint is a constant urge to have a bm and severe cramping all the time we have recently started on miralax he was taking a capfull a night then he got diareah we backed off we just started taking the miralax every 3rd day we just started that last night he is on a huge dose of pain meds but he has been on the same meds for 2 years help [ Disease ] looks like hives which is an allergic reaction can also be caused by hot tempreture antihystaminice is advised