ITV News has been hearing from children who are transgender or gender-diverse as part of a series of special reports.
Young people and their families, who attend a support group, have described it as a safe haven where they can be themselves.
However there are some who believe children are not old enough to decide if it is right for them.
In part two of our series, Matt Price has been speaking to one older transgender person from Sussex who supports these young people, but would encourage caution.
- Watch part 2 here
- Watch Part 1 here
ITV news has seen figures which show a big rise in the number of young people referred to the NHS clinic which helps children with their gender identity.
There were 223 around the South East coast in the last year.
97 children were referred to the Gender identity development service in the year 2009/2010.
That figure increased to 2,519 for 2017/2018.
The Gender Identity Development Service (GIDS) is a highly specialised clinic for young people presenting with difficulties with their gender identity development.
For more information including help and support, please see the contact details below:
Gender Identity Development Service http://gids.nhs.uk/
Mermaids, family and individual support for young trans people https://www.mermaidsuk.org.uk/
National Trans 24 helpline http://www.lgbtconsortium.org.uk/directory/national-trans-24-helpline
Stonewall, LGBT+ campaign group https://www.stonewall.org.uk/
Samaritans call 116 123