Pain in the low back can be a result of conditions affecting the bony lumbar spine, discs between the vertebrae, ligaments around the spine and discs, spinal cord and nerves, muscles of the low back, internal organs of the pelvis and abdomen, and the skin covering the lumbar area.
Common causes of facial swelling include: 1  allergic reaction. 2  eye infection (such as conjunctivitis) 3  surgery. side effect of medication.  cellulitis (bacterial infection of the skin of 1  face) sinusitis.  hormonal disturbance (such as thyroid 1  diseases) sty.  abscess.
So whatever causes your face to sink in and causes black sores on your face, it is not your sinus. See an dermatologist to determine the black sores and its cause. In brief: Not likely. Your sinuses are skin lined cavities in your skull at several different paired sites.