Thanks for the query. I understand your concern.
You had already gone to ER for swollen & fatigued legs. You have high blood pressure / excess body weight too.
In my opinion you need a more detailed study of your blood pressure / excess body weight .. which may lead to swelling of legs. possibility of diabetes
needs to be excluded along with cardiovascular health.
Baker's cyst ( a cyst at back of knee joint usually arises in cases with arthritis / pain in knee joint )on left side .. remains asymptomatic . It must be same in your case. That's why your doctor has not given you any specific treatment for it. HE has given you medicines for blood pressure & cholesterol
* Now about your question.
- The pain in your opposite leg can be from putting more stress
on right leg( the left one being affected by knee joint arthritis
. This results in muscular stress on right leg..
This can be managed by muscle relaxants oral or local ointment. & treatment of left knee joint & improved gate there after.
- May be pressure on local nerve supplying to groin region ( Right )due to wrong g problem.gate to adjust left leg.
This needs correction./ pain medication/ physiotherapy
& management of left leg problem.
- some times vertebral
degeneration ( aging/ over use/ trauma ) or disc problem cause nerve pressure at spinal level to give the symptoms of pain & leg fatigue
Imaging Invstigations with an expert advise to detect exact site & cause of trouble followed by specific treatment would help you.