concept photo of knee pain, pain or spasm in the calf muscle. patient lies on couch and hold on with both hands to the lower leg,

aching adult back blood body both calf care caucasian circulation concept cord couch cramping deficiency disease fatigue feet health hold illness injury knee leg lies lower male man medicine muscle nerve neurology nocturnal orthopedics pain patient people person phlebology photo pinched sharp sign spasm spinal sudden symptom thrown woman young