This is a very difficult time in life, for I am going through the same thing. She's lost as to what to do because the meaning of her life has changed now. It used to be raising children and caring for others, and now no one seems to need us as much. She needs to realize that this is not true. Everyone does need her still. Try to include her in as many possible activities with the family and MAKE her go to them. Now is the time for her to get involved with some girlfriends of her own. Unfortunately, many friends are busy with their own lives but they woe be glad to include your mom. She must for e herself to get up and shower and get herself feeling and looking as if she were going out so in case the opportunity arises, she will be ready to go and it won't be so much of a chore. Go to comments.
Both men and women sometimes go through periods in their lives where their hormone levels get out of whack. If there is nothing else going on in her personal or work life that would explain a change in mood or behavior then it might be a good idea to have a medical professional do a complete physical to rule out physiological causes.
Lots of good advice there but it may be as simple as realising that she's nearly 60. Some people get depressed when they begin to feel old.
By 58 her body will start to break down a bit, too, and she'll find it more difficult to do the things she enjoyed. It'll be harder for her to compete in the Hawaii Iron Man but it will also be harder for her to walk to the shops, or thread a needle. It hit me a few years later than that -- about mid 60s -- and I had a few bad years. It took a lot of determination to get my fitness back.
Perhaps the best thing you can do for her is to encourage her to find new hobbies, new interests, even new friends. Life doesn't have to end when you get old, it just needs to turn into a gentler direction.