Foamy urine and skin prob.

Hi, Recently while urinating , there is a foamy like appearence around 70% of time. Sometimes feel like burning sensation while urinating, pain in left back lower side. All symptoms are not consistent but appear at least 60-70% of time in a day. Sometimes red itchy spots on skin comeout and go automatically, having itch as well Done recent RFT and urine routine. Reports are normal. However last year abdomen USG revealed simple renal cortical cyst( report attached) Need help how to totally rule out any probability of kidney disease meaning, what further test if any required to rule out any disease. Presently suffering from high triglycerides and taking Rosuvas 10 mg for last 1.5 months Recent test revealed normal cholestrol and high triglycerides (354 mg/dl) Also can this foamy urine may de due to high triglycerides? Regards,