China Naming Network - Ziwei Dou Shu - It must be the cold weather that makes me sick. Why use making?

It must be the cold weather that makes me sick. Why use making?

Make sb. sick translates as make him tired and sick.

It must be the cold weather that makes me sick.

It must be the cold weather that makes me sick.

Modal verb+action verb is continuous, that is, it must be ...+do in the example sentence, which means to infer or comment whether an action is going on now.

The disease is going on now, so it must be making.