Hello dear, Given the case history that your father has multiple sclerosis, the possibility can not be ruled out. So, kindly consult a Neurologist & get a complete Neurological examination done. However, other causes for such symptoms also need to be considered, such as: 1. Paraspinal spasm & compression of nerve fibers at the Lumbo-sacral region or due to compression of nerve secondary to improper posture while curling weights at gym. 2. Inadequate hydration status & electrolyte imbalance of the body. 3. Dietary deficiencies of certain nutrients like Iron, Calcium, Vitamin D, Vitamin B12, Folic acid, etc. which help in blood formation & nerve conduction. 4. Peripheral neuropathy caused due to any fluctuation in blood pressure or blood sugar level. Certain investigations like complete blood count, serum electrolyte estimation, fresh estimation of blood pressure & blood sugar levels & nerve conduction studies will be helpful to rule out any pathological cause for the symptoms. Symptomatic relief can be obtained by intake of nervigenic agents (like Vitamin B6, Vitamin B12, Folic acid) as well as multivitamin & multimineral supplements including iron, calcium & Vitamin D needs to be added in your diet. Wishing you a Good Health. Take care.