SELF Care Week is aiming to help people take care of themselves, and let them know what is available in Wales to help them to do so.
Health Minister Lesley Griffiths said the week underpinned the Welsh Government's five-year vision for the NHS in Wales — Together for Health.
This includes the introduction of health checks for over-50s and personal care plans.
Lesley Griffiths said: "Our five-year strategy for the NHS, Together for Health, sets out a vision of creating a Wales where health matches the best anywhere.
"However, the NHS cannot do this alone.
"It can only be achieved where there is a partnership between the health service and the public.
"We must ensure everyone has access to reliable information about their health, and offer additional support for those who need it.
"Some people will need help and support to minimise the risk of developing avoidable health conditions, for example through improved lifestyle choices and access to healthy eating or exercise referral schemes.
"Other people with more specific health conditions will need additional help and support to enable them to manage these conditions effectively and to minimise their impact on everyday life."
She added: "We also want people to provide feedback on NHS services so we can improve the services we provide.
"Self care can have a huge impact on your quality of life."