**Some context:** My coworker and I are foreigners working in Japan as IT developers.

Our team works from home 2-3 days a week.

This coworker is working fully from home (too far from workspace).

**Issue:**

I recently discovered that one of my coworkers is pushing himself way too much: working a lot of (partially hidden) overtime, skipping or rushing lunches, not taking day off when sick, etc.

It took time to realize because he works fully remotely, and partially hides his real working time.

The reason we realized late is because it was mainly based to references he said
But we confirmed with him and have no doubt on the situation now

**What I tried:**

- Telling him that we work as a team and that we can all support each other.
 That we can talk openly when we need to adjust timing / deadline / resources.

- Telling him that taking breaks and proper sleep and lunch is helping us to work better.

- Suggesting he could take day off when he said he was sick and that we can follow-up / continue on his tasks.

- Warned my Scrum Master twice.
Thus, my SM sync with my coworker.

But even after all that it seems the situation did not change.

This coworker will easily say he think he is not capable etc., but if I try to ask more details he settles back.

I wonder what (other) approach would be good.