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.
Chronic sinusitis Chronic sinusitis, or sinus infections, cause a stuffy or runny nose, tooth pain, fever, sore throat and more. Mononucleosis Mononucleosis is a viral infection causing extreme fatigue, sore throat, fever, rash, muscle aches, and more.
1 Sinusitis (viral, bacterial, fungal, allergic) can cause: 2  Severe, pressure-like headache and tenderness in cheeks or forehead, aggravated by bending forward or lying down. 3  Pain in the teeth or back of the head (sometimes). 4  Blocked nose, thick or clear nasal discharge. 5  Sore throat and mild fever may be present.