Ruth, I hope that it is not too late to respond to the mother with aches, pains, and weight loss. I got my mail late, but felt compelled to respond. Before I would suggest weaning I would try some dietary changes. It sounds like there may be an absorbtion problem and nutrient dificiencies. Have they ruled out possible infection of some kind? Thyroid problem? It sounded like doctors not concerned about other diseases. Muscle cramping in different parts of the body are commonly caused by calcium/magnesium imbalances or vitamin E dificiency. Anemia may also result in cramping. Is the mother taking any medications that can cause this kind of reaction? like: Diuretics. Does cramping occur during activity or rest? If cramping occurs during activity suspect circulation problem. Vitamin E plays a role in circulation and supl. iron interferes with vitamin E absorbtion. Imbalances in Calcium and Magnesium can be the result of a diet high in phosphorus and the addition of TUMS will not help and may even interfere with nutrient absorbtion. A diet consisting of highly processed foods is often the culprit of a calcium/magnesium imbalance due to it's high phosphorus content. Soda, diary products, eggs, meat, fish, and chicken are also high in phosphorus. If the bulk of the mother's diet consists of these foods that may explain the problem. A diet high in these foods coupled with some mild malabsorbtion over time would cause excess weight loss during high caloric/nutrient expenditures such as breastfeeding. Another symtom this mother would experience would be lack of energy. I agree this mother should be checked for other possible problems. A comprehensive history from this mother would be helpful. A second opinion is in order! The ending of breastfeeding is the easy way out. Please let me know the outcome of this mother. I am always interested in dietary affects on the nursing relationship. Heidi C. Lunn M.S. Nutritionist La Leche League Leader