SM Virtanen, L Räsänen, A Aro, J Lindström, H Sippola, R Lounamaa, L Toivanen, J Tuomilehto and HK Akerblom.
Casein can also be found in less obvious foods, such as nondairy creamers and flavorings. , Pediatricians have expressed concern regarding childhood exposure to the exogenous estrogens in commercial milk, given studies showing that early sexual maturation in prepubescent children can be caused by the “ordinary intake of cow milk.”, A broad array of multi-centered, peer-reviewed studies has shown that dairy consumption is one of the most concerning and consistent risk factors for hormone-dependent malignant diseases, including ovarian, uterine, breast, testicular and prostate cancers. The American Academy of Pediatrics (AAP) recommends that children not be introduced to cow’s milk before 1 year of age because a baby’s body can’t tolerate the high levels of protein and other nutrients found in cow’s milk. These include: Your child’s doctor may also give your child milk and observe them for several hours afterward to look for any allergic reaction. Over time, all of this can have a detrimental effect on bone health.
You’ve Got Major Brain Fog.  D Feskanich, HA Bischoff-Ferrari, L Frazier and WC Willett. Milk contains a lot of fat and this does not digest properly with protein. , Casein is the main protein in dairy, and studies have shown that it facilitates the growth and development of cancer. Mammal’s milk, such as cow’s milk, is made up of: For most people with true casein allergy, milk and dairy in all forms must be avoided, as even trace amounts could lead to a severe allergic reaction called anaphylaxis, which can be life threatening. Available here: http://www.ncbi.nlm.nih.gov/pubmed/12189192 (accessed Feb. 6, 2016). "Unrelated to lactose intolerance, dairy promotes mucus production that aggravates symptoms of the sinuses and lungs," primary care practitioner Dr. Dana Simpler tells Bustle. 2006 Nov.  D Ornish, G Weidner, WR Fair, R Marlin and EB Pettengill, CJ Raisin, S Dunn-Emke, L Crutchfield, FN Jacobs, RJ Barnard, WJ Aronson, P McCormac, DJ McKnight, JD Fein, AM Dnistrian, J Weinstein, TH Ngo, NR Mendell, PR Carroll.  LD Youngman and TC Campbell. Available here: http://www.ncbi.nlm.nih.gov/pubmed/11034231 (accessed Feb. 11, 2016). 1992; 11(4-6):304-12.
Pediatr Int; 2010 Feb; 52(1):33-8. At that point, avoid feeding your child foods containing milk, and continue giving them only breast milk or formula.  K McVeigh.
You should avoid products that contain milk or may have been exposed to foods containing milk if you or your child has a casein allergy.
The fat content of ice cream may be causing your symptoms.
1997; 152:1-55. Not only has the body of scientific evidence been found inadequate to support the idea that dairy consumption promotes bone health, but numerous large-scale studies have found that consuming dairy may actually be detrimental to bone health. Dairy is associated with increased risk of several immune-related disorders (from allergic conditions to autoimmune diseases), many being life-changing and difficult to treat. Do I see a doctor??