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Yes, humira can cause joint pain, muscle ache, and even fractures. If you are getting severe joint pains maybe, you can consult a GI doctor and see if some other medication will help. The trick is to eat healthy, small portions of food at a time, drink plenty of fluids (not alcohol/wine/beer), and avoid gas causing food items such as milk and milk products, beans, spicy food, cabbage, broccoli, cauliflower, raw fruit juices and fruits. Take iron/vitamin/mineral supplements. Keep a food diary to note the food items which make you feel good, and those which worsen your symptoms. Needless to say, stick to the former list. Eat less fibers. Be under the treatment of a trained GI doctor and nutrition expert. Take care!