Does breathing in the water steam from a hot shower bad for you or your lungs?

Breathing in the steam from a hot shower is usually good for your health. It opens up the lungs better, like a humidifier for a sick patient would. The only consideration to this is what contaminants, or toxins might be in the water. If it is regular city water, then there are usually chlorines or chloramines dissolved in the water which can cause cancer whether breathing it in, or drinking it directly. This is why it is recommended to use filtered water in humidifiers. The best thing to do with the shower then, is to get a high quality shower filter like at www.mosteffectivefilter.com. Hope that helps.