This infection may increase post-nasal drip. If you suspect that you have a sinus infection, you should see your physician to see if it needs antibiotic treatment. Chronic sinusitis occurs when sinus blockages persist, causing the lining of the sinuses to swell further.
Causes of Pain in Left Side Back. 1  Pregnancy: Back pain especially on the left side, is very common in pregnancy and happens for a few reasons. As the child develops in size, the uterus can pack torment delicate structures including nerves. 2  Kidney Infection: Kidney diseases can cause left side back pain.
Pain in the lower left side of the abdomen is called left lower quadrant pain. It is often related to the digestive tract, but can also be related to conditions of the body wall, skin, blood vessels, urinary tract, or reproductive organs.evere pain that comes in waves may be caused by kidney stones. Trauma to the body wall, hernias, and shingles can also cause left lower quadrant pain. A hernia is a weakening of muscle or tissue that allows organs or other tissues to protrude through it.