The X Factor star has been holding mentoring sessions at Radio 1's Hackney Academy and working with young people in Newham at a Pupil Referral Unit.
Lewis told the Evening Standard: "I have a lot of family members who work in social services and they have seen so many cutbacks.
"They are working on minimum wages and they're dealing with some awful social issues. They really need help."
She added: "There is a lot of crime - a lot of it is out of desperation or boredom. There's nowhere for [young people] to channel their energy so it's easy for them to become involved in gang culture.
"I'd like to be more involved. My mum had a community centre for girls in Islington and I've always admired her for getting involved in the community. So if there's anything I can help out with in the future, I'd love to."
Lewis has previously said that her upcoming homecoming Hackney Weekend gig and the Radio 1 Xtra Academy is a "huge deal", adding: "Hopefully, people will be part of the Academy or see something inspiring at the show."