My 21 year old son is complaining of back pain near or at his kidneys, esp the left side. Hands and feet are swollen enough that gloves and shoes no longer fit correctly. He has waves of dizziness, constipation, cold flashes, gets very weak at times without exertion, and is constantly fatigued. He has been to multiple urgent care/er and they tell him ulcer and gas and send him on his way. This has been ongoing for months.