Thousands of people with alcohol-related brain damage (ARBD) could be going undiagnosed, an expert says.
Research suggests consuming 35 units of alcohol per week for five years or more can cause ARBD, which affects a person's ability to carry out basic daily tasks.
Lee Caldwell, 56, who was diagnosed with ARBD last year, said he struggled with short-term memory and impulse control.
Prof Gareth Roderique Davies said stigma and lack of awareness led to ARBD being missed or misdiagnosed, and said adequate resources remained a challenge.
The Welsh government said it was investing £67m to help people affected by drugs and alcohol, including ARBD.