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.
Putting fingers, cotton swabs or other objects in your ears also can lead to swimmer's ear by damaging the thin layer of skin lining your ear canal. Swimmer's ear is also known as otitis externa. The most common cause of this infection is bacteria invading the skin inside your ear canal. Usually you can treat swimmer's ear with eardrops. Prompt treatment can help prevent complications and more-serious infections.
An image of the bacteria, Haemophilus influenzae, known to be the main cause of otitis media in the middle ear. [ [3] ]. Otitis media is an infection of the middle ear, caused mainly by Haemophilus influenza, Streptocococcus pneumonia, or Moraxella catarrhalis, that mostly infects children at a young age.It is harder for young children to fight the microbe or a bacterium because their immune system is not fully developed.uring a viral upper respiratory tract infection(i.e. the common cold), inflammation can block the Eustachian tube. As a result the middle ear does not drain properly and the fluid builds up, becoming a breeding ground for bacteria. Additionally, children have larger adenoid glands than adults.