health issue body injures. knee effusion, fluid or water round the knee joint.

abdomen accident ache adult arthritis arthrocentesis arthroscopy athlete athletic body care closeup clothing concept effusion exercise fitness fluid footwear health holding hurt illness inflammation injured injures injury issue joint knee leg legs lifestyle ligament limb man medical medicine muscle organ pain painful physical pink redness round rupture skin sprain stiffness swollen symptoms tenderness therapy thigh treatment water workout