A water bag behind your knee bothering you? It could be a Baker’s cyst. It’s a small sac that forms behind the knee, especially after strenuous activity. It fills with fluid and may cause discomfort. Fortunately, it’s easily treated with medication and physical therapy. If not, a doctor can drain it with a needle. #BakersCyst #KneePain #TreatmentOptions | Elie Metni PT