很 + 舒服 / 不 + 舒服
The adjective 舒服 (shūfu) means "comfortable" and describes a state of physical or emotional ease. It can be used with 很 for emphasis, as in 很舒服 (very comfortable), or negated as 不舒服 (uncomfortable), which is also a common way to say "feeling unwell." It applies to physical sensations, environments, and emotional states.
这张沙发坐起来特别舒服。
Zhè zhāng shāfā zuò qǐlái tèbié shūfu.
This sofa is especially comfortable to sit on.
今天有点不舒服,可能感冒了。
Jīntiān yǒudiǎn bù shūfu, kěnéng gǎnmào le.
I'm feeling a bit unwell today; I might have a cold.
泡完热水澡后,整个人都很舒服。
Pào wán rè shuǐ zǎo hòu, zhěnggè rén dōu hěn shūfu.
After soaking in a hot bath, I felt completely relaxed.