If symptoms persist or become worse, however, immediate descent is necessary; even 500m can help.

By the second round of tests those symptoms had become less severe.

By the 1990s, symptoms of the Dutch Disease were once again becoming apparent.

At ten in the morning the symptoms of storm become aggravated.

If these symptoms persist or become severe, notify your doctor.

Breuer began to see his patient almost every day as the symptoms increased and became more persistent.

In those with Becker disease, symptoms most commonly become apparent between the ages of four and 12 years.

Once there is a significant build up of virus, symptoms become noticeable.

The passengers' symptoms became unpleasantly like those attending their start.

It's not cancer and can be treated if symptoms become bothersome.