Can you please tell me how pms and ovulation differ?

Eggs vs Edgy: Ovulation is the release of an new egg. Many think of bloating, abdominal cramps, constipation, breast swelling/tenderness, cyclic acne, joint/muscle pain (which can be bad) as pms. They are wrong pms is only the emotional symptoms - irritability, tension, or unhappiness - that appear predictably before the period, reduce or disappear just before or during and remain absent until the next cycle.