Hi Holly- Looking over your posts for the last year and a half, it sounds like ALS is ever present in your mind given you have lost a loved one to it. Losing a parent to the disease must have been very difficult. Hypervigilance for possible symptoms would be at the forefront.
Most people are asymmetrical as a matter of course, so dents, smaller on one side, etc is not anything to be concerned about unless there has been a drastic change in size and function in a short period of time.
Have you seen a doctor regarding your most recent concern? I would really hate to see you return here year after year as a method of allaying your worries. As you have been through this routine before with your doctors, it may be better if you see your gp. They have previous records and likely have an idea of how your legs looked a year ago and if there is any prominent change or cause for concern. They may also be able to help you explore your worries and provide in person assurance or recommendations for dealing with your health concerns.
~F