Cheerful alternating with burst of passion

Definition

Cheerful	Pleasantly bright, Encouraging, enthusiastic
Happy	Enjoying good of any kind, (happy hours in bar - satisfy desire).
Joy	The passion or emotion excited by the acquisition or expectation of good; pleasurable feelings or emotions caused by success.
Glad	In doing something willingly, showing pleasure in inviting someone.
Burst	To break through obstacles or limitations unexpectedly.
Passion	When any or completely masters the mind, it is called passion. Any suffering or distress.

It is a state of enthusiasm at one time unexpectedly replaced by effect of some external factor bringing suffering or distress, hence bringing a feeling of committing suicide

Sehgal Remedies

Aur
Caps
Croc
Ign
Stram