The last place you ever want to ask for help is when you’re on the toilet.  In general, the bathroom is the most dangerous room in the house for seniors; it has many slippery surfaces, sharp edges and involves a lot of motion in order to be utilized correctly. For many seniors who live at home, there isn’t a bathroom easily accessible on the main level of the house or close to the bedroom for use during the night.  There are several devices on the market that helps you get on and off the toilet safely.
 

Medline Toilet Safety Rails by Amazon

Of course, you can always improvise.  I found the picture below on the Internet.  Funny and practical.