As someone who has mental health issues in their family, this is driving me increasingly mad (pardon the pun!)
Increasingly these days you see people saying or writing 'mental health' when they mean 'mental illness' or 'mental health problems'.
'I couldn't do X because of my mental health'- kind of ok.
'I couldn't do X because I have mental health'- incorrect and increasingly common.
Why is this? Is it because people don't like using the word 'illness'? It is baffling to me!