Doctors caution expectant mothers to avoid substances that could harm their unborn babies.

Avoid substances that contain caffeine, such as coffee, tea, soft drinks, or diet pills.

Most simple rashes will improve with gentle skin care and avoiding irritating substances.

You should avoid specific substances that can trigger an episode of the irregular heart rhythm.

And avoid substances such as alcohol and caffeine, which can irritate the bladder.

It's a good idea to avoid substances you don't need, they say, but you shouldn't feel compelled to be a martyr, either.

Avoid substances known to irritate the bladder such as alcohol and coffee.

To prevent allergy symptoms, avoid substances you're allergic to, called allergens.

The best defense against allergic pink eye is a good offense: try to avoid substances that trigger your allergies.

By avoiding substances and behaviours that are cross-addictive with those of one's own addictive disease.