You should to see a doctor if you've been feeling unwell
I was feeling unwell after the ferry trip because of the storm.
She's feeling unwell.
I hear you've been unwell recently.
You look rather unwell
If you feel unwell, you should see a doctor.
Prospects for repair? "Prof. Shubaishen, the leader of the system development team, is presently unwell so we think it will take a while longer ..."
It has happened that people sleeping with the fan on have experienced a freezing of the stomach, as well as a local air pressure stress leading them to feel unwell.