The day a serious illness called "brain infarction" came to my family and what happened afterward

A stroke that came to my father, who couldn't get up in the morning and was vomiting.
Symptoms reappeared after about 1-2 years. The legs started to malfunction.
Memory decline and mobility difficulties are gradually worsening, but fortunately, I am still managing without major issues.

I'm not sure if I should write about my family's story. It was a few years ago when my elderly father retired and was spending his leisurely remaining years. I was about to leave for work when I sensed that my father's condition was not very good. He couldn't get up and was in great distress. When I tried to take him to the hospital by taxi, he said he couldn't get up and asked to call an ambulance. It was the first time in my life I had ever called an ambulance. Anyway, we moved to Kyunghee University Hospital, and he vomited without any apparent reason and was in pain. After receiving various treatments, and once the symptoms of pain and discomfort subsided, a thorough examination was conducted, and the diagnosis was a stroke. It seemed like a very serious illness, but fortunately, there appeared to be no major issues in his daily life. He was hospitalized for about a week and then discharged. He continued taking medication for the stroke and quit smoking, but since he had smoked all his life, it wasn't easy to quit. A few months later, he started smoking a little again. I tried to encourage him with good and bad words, but it was not easy. Smoking is really difficult for a stroke patient. Even from my perspective as a watcher. One day, while he was carrying something, his steps seemed a bit strange. He looked unstable and couldn't walk properly. When I asked him, he said he felt dizzy and lightheaded when sitting down and getting up, so he sat back down for a moment. After about ten minutes, he said he felt better and came back. The problem was that from that moment on, he couldn't walk properly and was walking with a slight tilt to the right, almost as if he was staggering. When we visited the hospital again for a detailed examination, it seemed that the stroke had worsened somewhat. He received further treatment for the stroke and was discharged, but he often feels a tingling sensation in one leg and finds walking a little more difficult. He still goes for walks, but I worry about what might happen next. Aside from the day he was taken to the hospital, there haven't been any major issues considering the stroke, but it was quite a shock for the family. As he gets older, his memory is gradually declining, and I don't know if it's because of age or the stroke, but it makes me a little sad.