My mother-in-law keeps thinking and asking about a person or situation repeatedly. Is it dementia?

Hi doctor,

I am asking about my mother-in-law's health condition. She had a stroke a few months back. After a week, she got discharged from the hospital with continued medications to keep her blood pressure under control and some antibiotics to cure her UTI. She can talk few words. Sometimes, it seems to be clear and sometimes, it seems garble. She can walk. She is strong and facing a tough situation. She has an itching feeling all over the body throughout the day without signs of insect bite or allergies.

She keeps on scratching her body for the whole day even at night. She forgets things. When a situation or person gets stuck in her mind, she keeps on thinking and asking about it over again and again. Currently, she takes Losartan, Amlodipine, Trajenta, and Atorvastatin. She was also advised to take Citicoline but we did not give her. Since after getting discharged from the hospital, we are not able to have a follow-up checkup due to the current pandemic. We are afraid of her risk to the immune system. Is it fine to continue her medications? What is the cause of her itchy feeling? Does forgetfulness occur due to dementia? Kindly suggest.