I have hay fever, so I struggle with spring.

He has a hypersensitivity to pollen.

He is suffering from heart disease.

The pollen of this flower may cause allergies.

He is oversensitive to sound, and he covers his ears even at a slight noise.

He has an oversensitivity to sound, so he prefers to work in quiet places.

He is my best friend.

He was running while holding a bag.

He always carries an umbrella around.

He was holding my hand tightly.