If your breath in a dream was hard, then it means you are suffering some negativity, fear or pressure depending on the circumstances in your waking life. If you saw yourself breathing while being under water, then such dream denotes to your connection with the mother and the times you were in the womb. Perhaps you are looking for some security, therefore you are hiding under the shelter. The dream of breathing under the water could indicate the lack of self trust, therefore you put all of the responsibilities to those around you. If you were holding your breath, then it means you are unable to make some certain decision. Probably you keep to our own opinion and do not let others to give the advice. If you dreamed of having difficulties while breathing, then it means you are emotionally wrecked and tired. Perhaps you need to take some time off to relax. The dream of having difficulty to breath could also be caused by the internal stimulus where you are having problems with breathing because of asthma or runny nose. The external stimulus such as the pillow could also cause these kinds of dreams.