Hello ma'am and welcome.
These could most probably be uterine fibroids, which can grow in size with time. We will have to wait and watch to ses if they are increasing in size or not. If at all they are causing symptoms like abdominal pain
, bleeding, etc; we may have to take an early call.
Depending on your mothers age we may decide to go ahead with a small procedure or surgery to remove the uterus
. Medications usually are not helpful for this condition. Although nothing dangerous, it is still best addressed.
Hope this helps.