A sinus infection CAN kill you.
More Info: A sinus infection is usually not fatal and in most cases can be resolved with self-treatment and medical care. Problems arise when rare complications occur such as a bone infection or meningitis.
A rare form of sinus infection, rhinocerebral mucormycosis, is fatal. This rare sinus infection is caused by saprophytic fungi attacking the sinuses and brain and usually occurs in immunocompromised patients. It is rapidly progressive and highly fatal.
What Is Meningitis?
Meningitis, a potentially life-threatening disease, is an inflammation of the membranes that protect the brain and spinal cord. Many things can cause meningitis including certain types of bacteria, viruses, other microorganisms, and even some varieties of drugs. Symptoms of meningitis include headache, a stiff neck, confusion, fever, and an acute sensitivity to light. With the proper medical care, which must be prompt, meningitis is treatable.
Can You Have a Sinus Infection without the Symptoms?
Early on, you may have a sinus infection with very mild symptoms but will never have an infection without any symptoms at all. Since every infection affects the body in negative ways, the resulting symptoms will become more noticeable with time. A lot of people incorrectly misdiagnose an early sinus infection as a cold and start taking treatments which mask some of their telltale sinus infection symptoms. Also, people that are prone to headaches or allergies have a tendency to write-off the early warning signs of a sinus infection.