UFC's 'Cyborg' Justino: Spider Bite was No Joke ... Needed Major Medical Attention

Cris "Cyborg" Justino says her black widow bite was so bad, she required hospital care ... but says she's confident she'll resume MMA training as early as next week.

As we previously reported, Cyborg was bit by the venomous spider while gardening at her L.A. home last week.

Cyborg says she didn't realize what bit her at first -- but the wound got really bad and painful ... and she finally went to the hospital when she began to feel extremely sick.