Referencing her memoir Brutally Honest, set to be released in November, she said: "I do address a lot of those issues.
"But no, I'm not an alcoholic. No, I'm not a sex addict. I was with the same person [ex-husband Stephen Belafonte] for 10 years, and that was quite a turmoil, very intense.
"That's all I can say about it. I'd like to say a lot more, but on this show, let's keep it PC.
"But yeah, I address a lot of those issues, and I did kind of have to ease my pain."
Brown adds: "I do suffer a lot from PTSD."
In an interview with The Sun on Sunday, Mel B said that she would be checking into a "proper therapy program" in the UK next month.
"I am being very honest about drinking to numb my pain but that is just a way a lot of people mask what is really going on," she said.
"Sometimes it is too hard to cope with all the emotions I feel. But the problem has never been about sex or alcohol — it is underneath all that.
"I am fully aware I have been at a crisis point. No one knows myself better than I do — but I am dealing with it."
The Leeds-born mother-of-three added that she hopes to shine more light on PTSD.
"I am still struggling but if I can shine a light on the issue of pain, PTSD and the things men and women do to mask it, I will do.
"I am speaking about this because this is a huge issue for so many people."