Surface skin pain on left side of abdominal area and left side of lower back.  feels like a severe sunburn.  no marks or redness.?

Skin pain. Age? Recent illness or stress? May be early symptoms of shingles. If redness & blisters develop, see fp for meds to lessen severity of shingles (reactivation of chickenpox virus herpes zoster) & to prevent post-herpetic neuralgia (nerve pain).
Radicular pain. Pain described above is suggestive of pain origin from nerve coming out of low back.This could be due to multiple reasons like infection, disc disease and other causes.See your doctor.