Shannen Doherty has finally opened up about her struggle with cancer.

In an interview with ET, the 45 year-old actress explained why she needs to do chemo and radiation. “I had breast cancer that spread to the lymph nodes, and from one of my surgeries we discovered that some of the cancer cells might have actually gone out of the lymph nodes.”

The Beverly Hills star revealed what makes her worry the most, “Is the chemo going to work? Is the radiation going to work? You know, am I going to have to go through this again, or am I going to get secondary cancer? Everything else is manageable. Pain is manageable, you know living without a breast is manageable, it’s the worry of your future and how your future is going to affect the people that you love.”

Having ‘traumatic and horrible’ time, she recounted how she started losing her hair. “After my second treatment, my hair was really matted, like in dreadlocks. And I went to try and brush it out, and it just fell out,” she said. “I just remember holding onto huge clumps of my hair in my hands, and just running to my mom crying, like, ‘My hair, my hair, my hair, my hair.’ ”

She then decided to cut her hair and her mom cut it into bob style. “But it wasn’t enough, you know, it was falling out.”

At the moment she cut her hair, her husband Kurt Iswarienko was not there. “He was in Mexico working and he was texting nonstop in the middle of his photoshoot like, ‘Give me pictures, and are you OK? I wish I could be there,’ ”

“He was so stricken that he wasn’t there with me but I sent him pictures and videos and he was like, ‘Oh my God. You’re hot with no hair.’ So you know, everybody kind of made me feel better about it.” she continued.

However, the man she has been married to for five years was always there for her especially after she had her chemotherapy as she said, “He puts me in the car, he buckles me in, and he drives me to my oncologist and they hook me up to an IV and I get hydrated. … There’s nothing going in my body, it’s all going out.”

Shannen then admitted that she has a desire, ” if I could help one person then it makes me go, ‘Oh OK.’ It’s easier to live with having cancer if I know I’m helping at least one person.”