There is such a tale that if in people of age the urine has become cloudy and with a putrid odor, then this is a guaranteed infection in the urinary tract.
Not at all necessary.
Urine often becomes cloudy simply from being concentrated.
Our urine contains not only water, but also a bunch of waste products. If you reduce the amount of fluid you drink, your kidneys will still drain waste into urine. Their concentration will simply increase. All this rubbish will mix and become cloudy.
Moreover, it is in the elderly that there is often a lack of fluid. They are weak, and there are still problems with their heads. Some refuse to drink.
Remember the story about an English student who invented jelly candies with water especially for his grandmother? Because my grandmother was mischievous due to dementia and refused to drink. This situation is very common. Elderly people don't drink much and urine becomes cloudy.
And this urine can stink. We have already discussed bacteria in urine. Microbes can live and multiply there, but not harm.
True, when microbes multiply, they can give off a lot of different smelly muck. That is why grandparents sometimes frighten those who take care of them with their smell.
Further, it is even stranger. Concentrated urine, with its caustic waste, burns and irritates the urinary tract. It turns out a complete illusion of cystitis.
So with grandparents, the approach will be a little different. In their case, an infection in the urinary tract will be indicated by a jump in body temperature or visible blood in the urine, or if they suddenly wet themselves for the first time, or they have a severe stomach ache. There is a whole list of rules.
Moreover, if an elderly person suddenly became worse in his head, then this is not necessarily an infection. Because many at this age and without infection have sharp changes.
In short, don't be intimidated by cloudy and smelly urine, but watch out for fever, severe pain, bleeding, and incontinence.