Hii , Welcome To HCM & Thanks For Asking Your Query Here I have gone through Your query and will try to provide information you need on it As you said You walk almost 10 Km A day and your age is 73 years it is very likely that muscles of your legs are getting fatigue walking is good exercise for your cardio vascular health but along with that you should take proper balance diet including essential vitamins and minerals specially calcium You may Take Anti inflammatory Drugs Like Diclofenac with Muscle Relaxant like Chlorzoxazone to relieve pain , but it will only give symptomatic relief in your age it common to have leg pain after walking this much so in my opinion you should consult with your doctor and have an health check up done including some investigation for vitamin deficiencies (specially Vit. D3 , Vit. B12 ) and Also serum calcium and Bone Density check up Apart From this you can follow these instructions to sooth your legs at home after walking - - Elevate your legs while resting - Consider an Epsom salt bath. Soaking your legs in a warm Epsom salt bath can significantly reduce pain and swelling -Do some leg stretching- As you re walking long distances, maybe the stress in your legs is due to muscle strain. so stretching will help -Change your shoes if they are ill fitting - Massage your legs can help also i hope this help Thanks again & Get Well Soon