Docs can you explain what is "emotional lability" when it is given as a possible symptom of ms?

Unstable emotions: It means that a person will get easily emotional about things that may not normally affect us. There are several stages of severity. In mild cases, it can just look like moodiness. In severe cases, patients may experience intense feelings of happiness or sadness over trivial issues or even without a clear provoking factor. They may go from one to the other very quickly. Hope this helps.

Pbs: Agree, in pbs, pt may react w apathy or laugh /cry spell.

Two forms: First, associated with a diffuse brain problem associated with cognitive loss is a compromise of emotional expression, and minimal events can trigger sudden uncontrolled emotional responses. But MS can also be associated with Pseudo-Bulbar Affectual disorder, which is sudden crying or laughing for no explicable reason.