What is tree lump?

As an AI language model, I do not have personal experiences or emotions. But, here are some pieces of information about tree lumps:

Tree lump is a thick, protruding area or bump that appears on the trunk or branches of a tree. It can be caused by a variety of reasons such as insect infestation, environmental stress, disease, or physical damage. Tree lumps can vary in shape, size, and color and can sometimes ooze sap or moisture. In some cases, a tree lump is a harmless growth that does not affect the tree's health, while in other cases, it could be a sign of a more serious problem. If you notice a tree lump on your tree, it is important to have it inspected by an arborist to determine the cause and whether any action needs to be taken.