Under the Weather

When someone says they are feeling "Under the Weather," they mean that they are not feeling well.
This idiom dates back to the late 19th century when it was a popular belief that bad weather makes a person ill. 

Similarly, we say catch a cold/have a cold. Mothers often tell us to dress warmly or we will catch a cold. However, scientists now say that cold weather does not play a role in getting sick. According doctors, we get a cold, not from being cold, but from germs.

What do you think?

Blessing in Disguise

Blessing in disguise means that something is good, but it's not recognized as being good at first.

For example:

When Marianne lost her job, she was devastated. But a month later, she found a more interesting job with a higher salary. So, losing her job was a blessing in disguise.

Be A Mixed Blessing

When something is a Mixed Blessing, it means that has bad effects as well as advantages.

For example:

The new shopping center was a mixed blessing for the community. It gave the neighborhood a place to do their shopping and created new jobs. However, it also caused a lot of traffic.