Hi, Arthritis is a condition that primarily affects the joints, causing pain, swelling, stiffness, and reduced mobility. It is caused by inflammation of the joint tissues and can be due to several factors, including autoimmune disorders, genetics, and wear and tear on the joints over time. Skin allergies, on the other hand, are caused by a reaction of the immune system to an allergen, such as a substance that comes into contact with the skin. Skin allergies can cause redness, itching, and rash in various parts of the body, including the ankles and elbows. While arthritis can sometimes cause skin problems, such as psoriasis or eczema, it is not a common cause of skin allergies. Skin allergies are typically treated with topical or oral medications to reduce inflammation and itching, as well as avoid exposure to the allergen. If your mother is still experiencing symptoms despite consulting several doctors, it may be beneficial to seek out a rheumatologist who specializes in treating arthritis and related conditions. A rheumatologist can help diagnose and manage arthritis, including prescribing appropriate medications, physical therapy, and lifestyle changes. Take care. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. Priyanka, General & Family Physician