Frequent unexplained crying is quite common and highly manageable. It is often linked to hormonal fluctuations (such as postpartum or perimenopause) or mild, underlying mood conditions like anxiety or depression. I recommend she consult a primary care physician or gynecologist to check her hormone levels and overall health first. Depending on the evaluation, highly effective treatments include talk therapy, like Cognitive Behavioral Therapy (CBT), or daily medications. Generic selective serotonin reuptake inhibitors (SSRIs), such as sertraline or escitalopram, are frequently prescribed to help regulate emotions. Please reassure her that this is a very treatable concern and she is not alone.