Whats the signs of middle ear infection and does it cause headaches and what causes middle ear infection ?

Headache yes: Blockage of the eustachian tube causing the accumulation of fluids in the middle ear. A bacterial or viral infection of this fluid is usually what produces the symptoms of an ear infection.

See Below: Typical signs are ear pain, hearing loss, and difficulty sleeping. The ear infection may cause headaches as well. A middle ear infection is caused by the invasion of bacteria or virus, resulting in the swelling and accumulation of fluids in the middle ear. To be assessed and potentially treat the infection, it would be good to schedule a visit with your doctor.