My plant is growing tall and lacks leaves on the lower stem area. The leaves are also looking kind of shriveled up a little bit.
You can try to make sure the plant is receiving enough sunlight. The lower leaves are often shaded by the plant and don't receive enough light. They drop off and will not grow back.
If you plant is too tall, this could be a good time to start new plants with cuttings.
This article will help you.