Surgery 
To dream that you or someone else is undergoing surgery suggests that some aspect of your life - a person, issue, or situation - needs to be removed. It is influencing you negatively. Perhaps someone in power is trying to persuade you to do something you are uncomfortable with. Alternatively, you are feeling the influence of some authority figure.
This dream may also be incorporating your anxieties regarding a scheduled operation or your general well-being.
Well
To dream of a well is a symbol of a kind nature and your ability to share your blessings with the people that surround you.
Operation
To dream of going through an operation symbolizes the need to get something out of your system, particularly in the areas of letting go and modifying your habits. It likewise signifies the need to slash something out of your life.
On the other hand, to dream of performing an operation on someone connotes some serious matters and subdued thoughts that you are encountering.
*See Surgery.
- 1