Have you lost more than over the past 3 to 6 months for no known reason?

The pain may start with a touch, movement, air drafts, eating, or for no known reason.

This symbol and 12 other characters have been included in these blocks for no known reasons.

A few young were born in the first couple of years, but then breeding stopped for no known reason.

Pain in the chest, abdomen, or bones for no known reason.

There is no known reason why a commission should not sit in parallel with criminal proceedings.

Good men both, yet they had reacted with hate at first sight, for no known reason.

One runs in families or appears for no known reason.

It may also start gradually for no known reason and get worse over time.

Fever for no known reason that does not go away.