 [ Symptoms ] i have experienced severe pain in both my knees feels like a sledge hammer coming down on my knees [ Disease ] this can be explained by only 2 possibilitys first is sever cold in knee joint which scientificly increase at night causing sever pain second is panic attack which also show at bedtime no physiological reason is logical your symptoms yet if you have a small degree of osteoarthritis the previous two explainations can increase pain good luck