What signs did you miss?

I was trying to find a picture of my kids from last year yesterday and I was going through an album of the week when WP started the 6-month A I know the dates of. I came across some pictures he had me take of his scalp and hairline. He had just been prescribed a minoxidil/rogaine combo to prevent hair loss and told me he wanted some « baseline » pics to determine if it was working. I was literally floored when I came across these forgotten pics. I mean ofc he was worried about his hairline when just starting an A! And after 3 years with me - I had never mentioned it and didn’t think twice about his hair loss!

What tells or signs did you miss that now when you think back on it, post DDay, it all makes sense ?