Lou Vincent is receiving treatment for depression following his axing from the national team, reports New Zealand's Herald on Sunday.
Vincent was dropped by the Black Caps in December after a poor run of form and has subsequently admitted to a struggle with depression.
The 29-year-old batsman withdrew from all cricket shortly before Christmas due to 'mental exhaustion' and has since consulted a clinical psychologist and started taking anti-depressants in an effort to return to full health.
He has already started to make progress and recently returned to domestic action with Auckland.
"I was beaten by it. I was completely beaten by it," Vincent told the Sunday Star Times.
"I let it get to me and it just took over. Until you've actually been through it, you can't imagine how bad it is.
"For as long as I can remember I've been riddled with self-doubt, I've had no self-belief, and I've just been hating the guy I've seen in the mirror.
"I remember so many days that should have been great days, when I've gone home, slumped over a chair and thought, 'I just hate this and I hate myself'."
Vincent's admission comes on the heels of Australia fast bowler Shaun Tait taking an indefinite break from the game due to 'physical and emotional exhaustion', while England batsman Marcus Trescothick has not played international cricket since returning home early from the 2006-07 Ashes tour due to a 'stress-related illness'.