One of the difficult things about depression is how it manifests from person to person with a lot of variation, even more so how it does so between genders.
I’m guilty of not being able to see my own depression as it became worse over several years. Personally I tried to deflect and often attributed it to stress, fatigue and sleep issues. The above article was a good review and reminder that there’s a spectrum to depression which isn’t always easy to identify.
From my own experiences it’s also extremely difficult to get someone suffering from depression to spot their own signs. I was very dismissive of it and it cost me greatly. The approach for everyone may be very different from person to person but a lot of times frustrated spouses and friends may come at the issue a bit hard and critical. For me at least that approach made me recoil inward even more and in some ways built my own frustration. If you have a loved one whom you suspect is suffering from a form of depression, let them know you’re worried, let them know you’re concerned and offer to just listen to what’s bothering them. A lot of times it’s just being heard that it’s the first step. Recommend therapy or other activities to help as coping tools, but try to do so constructively and not as a criticism or implication that they are somehow broken. Depression in it’s many variations is difficult to manage and even harder at times to spot but a good support does wonders.