Losing patience is being self-focused, rather than being other-focused. We all have been guilty at some time of judging others, and when we become impatient we tend to blame the other person, yet, it really is a lack of sensitivity on our part of not understanding, ignoring, or not caring about the needs of another.
Patience, in its best light, is affording the other person to be in their own time, place, or space, and to be accepting of that.
"Patience is the companion of wisdom." ~ St. Augustine
During illness, impatience can easily appear for all involved–the patient, caretaker, observer–as the stresses of the situation build up. If you are able to put into action and proper perspective the needs of another you may discover that impatience will fade away.
Another aspect of patience is patience with self. Often, we are impatient with self by not loving ourselves enough to meet our own needs and to allow new experiences. When we have needs and desires and set them aside and deny our authentic self, we are not happy, and may become angry, resentful, and stressed out. Anxiety builds and that is not healthy.
In both areas of patience we have to learn to be allowing, to give others their space–and to grant that same to ourselves.