What can cause muscle deteriation and chronic throbbing pain in both hips?

Arthritis. Differential diagnosis is polymyalgia rheumatica, polymyositis, bursitis or other type of arthritis. Have your dr do a sed rate, cpk, aldolase, thyroid tests., as well as chemistry and blood count. If all are negative, a reexamination and history are needed. Xray can be helpful.