For me, walking several days is not to survive suffering. For me, it is to enjoy nature, leave the society for a few day and see/feel that I can survive with few means.
That doesn’t mean I never had pain and had to suffer but then we have to collaborate, carry some of each other’s weight and learn how to avoid this problem in the future.
Once a nephew had twisted one foot a few days before the six day walk ion the mountain. He halted and problem to get support the leg. He insisted to come along. I put on bandage and gave him a pain killer. The next two days I gave him pain killer in the evening and during the day he had bandage. The last three days the suffer was over and he was demoted from being the pacers in the front and he got back some of the load.
Accidents happens that result in suffering, but that is an opportunity to learn how to avoid the accident.
For me, it sounds like you have not figured out what causes the pain. Â Is it to heavy load? Is it not suitable shoes for your feet? Maybe you should use long patches of sports tape instead of band-aid? Should you reduce the stress on your feet by using walking sticks? Do you walk to long distances per day? May be you need to put in more resting days and so the body get some time to recover?
You should not need to have pain like this on every trekking.

