1 Overuse or doing too much too soon when the tendons are not used to a movement or to the task taken on. 2  Tendinitis is common in weekend warriors, people that play and exercise hard only on weekends. 3  Occasionally an infection can cause tendinitis, especially infection from a cat or dog bite to the hand or a finger.he symptoms of tendinitis include: 1  Pain at the site of the tendon and surrounding area. 2  Pain may gradually build up or be sudden and severe, especially if calcium deposits are present. 3  Loss of motion in the shoulder, called adhesive capsulitis or frozen shoulder.
In most cases, the cause of lichen planus can't be found. It is not caused by stress, but sometimes emotional stress makes it worse. This disorder has been known to occur after contact with certain chemicals, such as those used to develop color photographs.n some people, certain drugs cause lichen planus. These drugs include medications for high blood pressure, heart disease, diabetes, arthritis and malaria, antibiotics, non-steroidal anti-inflammatory pain killers, etc.
Although it is true that we do not know the cause of lichen planus, most practitioners and patients with lichen planus will tell you that they can document the development of lesions when their stress levels increase.