Hi welcome to HCM I can understand your concern for your pain and stiffness in fingers and wrists . Dear , as you say your mother had rheumatoid arthritis , you have stiff fingers and now your son also has arthritis This seems to be Immunity issue . I am compelled to think that there must be some fault in diet & life style , which is the basis of our life and going thru generation to generation . It can happen due to many other factors , injury ,overwork like typing etc., Sometimes removing the cause helps remove the problem . The best way is to modify your life style and food habits Include a proper regular physical activity - walk ,Yoga & Pranayam , meditation - which caters exercise to strengthen each and every part of our body including our mind . Rotating & stretching your fingers and thum and wrists , opening and closing fist all help alley pain and stiffness instantly . A balanced diet , containing all essential nutrients - fiber, minerals , vitamins ,antioxidants - ginger, garlic , proper hyderation helps boost your immunity fof healthy disease free life . 1.A spoon of Turmeric powder with a cup of hot milk + a spoon of Almond oil 2.Aloe era juice 20ml + Amla juice 20 ml in the morning for 15 days helps alley pain and inflammation . Lemon juice , Banana & sunlight give Vitmin C & D,and help in bone pains stiffness and inflammation . Avoidance of fried , fast food , tea , coffee , alcohol , sleeplessness , dehyderation , worry , constipation is defenately a better option for boosting immunity . Crepe bandage after Application of anlgesic ointment can give instant relief . If problem persists ,it is advisale to consult an ortho expert Hope this helps solves your query .Take care , All the best . Don t hesitate to get back if have any further query