There are an estimated 30,000 mountain lions in the western United States. One mountain lion subspecies, the Florida panther, is critically endangered with a population of less than 100 individuals.
Causes of muscle twitching include: 1  Pregnancy. 2  Stress or anxiety. 3  Excessive caffeine. 4  Hypothyroidism. 5  Bug bites or stings. 6  Mono. 7  Parkinson's Disease. 8  Side-effects of certain drugs or medication (such as diuretics, corticosteroids, or estrogens).9  Dehydration.hese twitches often go unnoticed, and when you do feel them, they tend to feel worse and more noticeable than they actually are. Twitches, also known as fasciculations, can occur in the arms, feet, fingers, hands, head, legs, stomach, and other parts of the body.
Headaches, muscle pain, muscle tension, tight muscles, and stiffness are all common symptoms of stress-response hyperstimulation. As long as the bodyâs stress remains elevated, one, or a group of muscles, can remain tight causing anxiety related muscle tension symptoms. Moreover, recent research has found that psychological stress can negatively affect pain modulation (the bodyâs ability to regulate pain).