For example, having ceramic tile installed on a cement floor will likely cost more than having the same tiles installed in a kitchen sitting on a wood foundational surface. The latter example requires fewer materials and less time to complete the installation.
A lot of things can cause stress. You may feel stress when you go on a job interview, take a test, or run a race. These kinds of short-term stress are normal. Long-term (chronic) stress is caused by stressful situations or events that last over a long period of time, like problems at work or conflicts in your family. Over time, chronic stress can lead to severe health problems.
First is a protein called prolactin, which is also known to control breast milk production. Adrenocorticotropic hormones are also common and indicate high stress levels. The other chemical found in emotional tears is leucine-enkephalin, an endorphin that reduces pain and works to improve mood.