My daughter and my son have the sickle cell trait, and both of them have symptoms. My son just have chest pain sometimes, not too bad, yet. In the other hand, my daughter started having symptoms (dizziness almost to fainting) since she was 11 years old; then sometimes she had some really bad episodes of shortness of bread during her conditioning. I took her to a Pediatrician when she got the chest pain and it didn't go away for 3 weeks; he said "Sickle cell trait doesn't have symptoms, she has asthma;" I told him to look for medical articles, but he ignored me. Since then she is been having a lot more health problems: chest pain and shortness of breath episodes more often, and now muscle weakness to the point of dropping to the floor, but worse now her lungs are not ventilating properly. We were recommended to take her to a Pediatrics hematologist (with knowledge about Sickle cell trait), we are waiting for her appointment. I wish you, your family, and my kids to have the best outcome for this health problem!