My Mother Who Is 95 Came And Told Me She

My mother who is 95 came and told me she has gone through black out where she does not faint, but seems the blood is leaving her head. She's worried that may be stroke coming? What can this be? She's worried. I live with her so she is doing good. She take salt pills for low sodium problems. I make sure she takes them daily. Low sodium?
Thank you