I give my wife different foods all the time thinking she might be allergic to them but she continues with the diarrhea. Is this a natural thing with older people?
She has almost stopped eating entirely thinking she will get over it. I give her foods with no spices, skim milk, no tomatoes but she keeps me going. Now she won't hardly eat anything and that scares me.
If you have tried the OTC remedies for diarrhea and they have not worked you need to think of other causes.
From problems with food to food borne illness to a condition called C-Dif.
While not a great time you should contact her doctor and determine if there is a way that the cause can be determined. A fecal sample to the lab might be all that is needed.
The other problem that this can lead to is very sensitive skin, redness,rashes almost like a child would develop a "diaper rash" and the solution is the same. Gentle cleaning, drying the area and applying a light coating of a barrier cream. (pat it on do not rub as that can pull or tear the skin) If you apply more than is necessary it is difficult to clean off and you do not want it to build up.
It is important that you keep her clean and dry.
Please contact her doctor. if diarrhea continues for very long dehydration is a concern as is the fact that she is not getting proper nutrition and that leads to a whole other set of problems.
Best of luck!!