Do you see mushrooms developing in the center of the gorgeous green garden of yours? Lawns which are green and healthy look ugly with those mushrooms appearing in the midst of theirs. Yard mushrooms are products of grass fungi that infested the yard of yours. They are not only unappealing but some lawn fungi can actually kill the grass of yours.  
As a result if you see mushrooms and some yellowing in the grass of yours, you have to be alarmed.  
Lawn mushrooms feed on older mulch, animal waste and rotting tree stumps. If these particles are present in the lawn of yours, Learn more (look what i found) you will surely see mushrooms appearing all the time.  
When you see mushroom, it is an indication that grass fungi is found in as well as around the lawn.  
You've to eradicate the lawn fungi and what's leading to the lawn mushroom to appear. Clean up the lawn by taking away decaying issues in the lawn of yours.  
Even though you may eliminate the mushrooms if they appear, you've to ensure that you are going to take away from the lawn of yours the decaying matters which the mushroom thrived on.  
You may also need to do dethatching as well as aeration to ensure that there are get rid of all the alien particles within the lawn that can create problems later on.  
Lawn mushrooms can spread spores in other areas of the lawn of yours. As a result, even in case you eliminate the lawn mushroom which appeared, you'll again see mushroom coming out in other parts.