Bipolar Disorder Support Group
Bipolar disorder is not just a single disorder, but a category of mood disorders marked by periods of abnormally high energy and euphoria, often accompanied by bouts of clinical depression. This is the place to talk about your experience with bipolar disorder, learn from others' experiences, and find support.
Sounds like its worth looking at different mood stabilisers if the acne is definitely due to the lithium.
Best discovery I ever made, google it :D