Kidney stones, If you are asthmatic and use inhaled steroids to manage your breathing problems, think twice. You may be at greater risk for developing lung infections, say, researchers, while cautioning doctors against prescribing them.

Nontuberculous mycobacteria (NTM) are in the same family as tuberculosis (TB), but NTM comes in many different species and are widely dispersed in the environment. Although they cannot be spread from person to person, NTM are difficult to treat and can cause serious illness, and even death.