The cause of muscle cramps isn't always known. Muscle cramps may be brought on by many conditions or activities, such as: 1  Exercising, injury, or overuse of muscles. 2  Pregnancy. 3  Cramps may occur because of decreased amounts of minerals, such as calcium and magnesium, especially in the later months of pregnancy.
Causes of Otitis externa. Causes of Otitis externa. Otitis externa is caused by a bacterial or viral infection in the external part of the ear canal. A common bacterial pathogen is Pseudomonas aeruginosa. List of causes of Otitis externa. Otitis externa Causes: Risk Factors.
Otitis Externa: Often referred to as âswimmerâs earâ, an infection of the ear canal may be related to water exposure. Although the most common symptoms of otitis externa are pain and tenderness of the ear, conductive hearing loss can also occur if there is severe swelling of the ear canal. Foreign body in Ear Canal: This is also readily identified on examination and can usually be cleared in the office.