You can have both Parkinson's and Essential Tremor at the same time. I also think that sometimes it isn't a clear cut situation. My husband has PD. I noticed that his hands shook when he was watching TV. I have also seen his hand shake when he was carrying something, so presumably not a resting tremor.

In your case, having a tremor when standing on the ball of your feet could be a muscular issue rather than a Parkinson's issue. Strengthening your legs might stop it.

I only had tremors in my hands and that was for 16 years and then in 2016 I was diagnosed with Parkinson and given carbidopa levedopa and the tremors almost went away they come back when I'm under a lot of stress like a funeral or exercising but go away as long as I take meds

I have a tremor in my left leg but only when my foot is raised on the ball of the foot. Can this turn into a resting tremor?