病気 - sick, illness
I am sick
I have a condition (もしあまり話したくない)
I have an illness
I am ill
ウィッグ - wig, hairpiece, toupee (男)
をつける - ウィッグの場合はwearing
Wearing a wig/hairpiece
I wear a wig/hairpiece
~~のため - because of ~~
病気のため - because I am sick, because I have an illnessなど