Please suggest some advice to reduce my mother's leg pain.

Hi doctor,

My mother is 68 years old. Her weight is 165.34 lb and height is 5.41 ft. She has severe right leg pain from behind the knee and around the calf muscle, especially in the nerves. She has varicose veins on her thighs and has had continuous pain for nearly 35 years following her third pregnancy. She is a homemaker and does all her work herself, she feels tired every two hours to the extent where she cannot lift her leg anymore. A half an hour relaxation will give her energy to get back on her legs. She is doing yoga to manage this pain without any medication. Currently, thenerve pain keeps changing from one place to another and varies randomly. It increases when she has a hot water bath or hot water foot massage and walks as a part of her routine exercise. She also feels like there is a bubble, which keeps moving. Sometimes, she is unable to walk or walk with a help of the stick very slowly. She is applying oil on her leg, but has found no relief. She is on Topdip 5 mg for blood pressure (BP), B complex and Neurobion tablets. She had a kidney stone last year and removed it by taking ayurveda medication. Her thyroid and sugar levels are normal, but have vitamin D deficiency. So, she has started taking Vitamin D supplements. She is a vegetarian and will not consume any junk food or sweets. Please suggest some advice to get relief from the pain.