Dead, damaged, or diseased limbs on your tree can be a hazard to you and your property and should be removed immediately. Another indication your tree needs to be pruned is unruly, heavy, or overgrown branches. Excessive pruning can weaken a tree, making it more vulnerable to infestation and disease, hindering its growth and causing long-term health problems. An arborist will be able to determine if a tree needs pruning and expertly select which branches should be removed.