Sharp pain in upper left arm and behind left knee sharp pain behind my ears at times sometimes itching on upper back, no rash or pimple, pain in urethra comes and goes, face pimples come and go, muscle at elbow hurts, ears ringing anxiety or stress?

Many varied sx’s: This wide range of symptoms would be hard to fit together in one diagnosis, stress & anxiety could possibly lead to them: stress can change hormone balance which can lead to pimples. It can tighten muscles which can lead to pain, & can cause itching +/- rash. The urethral pain may need a Dr visit & lab work though (unless you have greatly increased your caffeine intake). If worse call Dr