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.
If you take painkillers to try to alleviate it, sometimes your pain will disappear, but it will return in full force within a few hours or the following day. Abdominal pain on the left side is one of the most common kinds of pain that doctors hear about from their patients. Like we said earlier, most of the time this is due to an excess of gas in the region.