Some young and otherwise healthy people can develop chemical imbalances, such as potassium deficiency, that may lead to irregular heart rhythms and even sudden heart attacks and death. Other problems associated with bulimia are corroded tooth enamel and swollen glands from repeated vomiting, loss of bone and muscle tissue, other symptoms of malnutrition from starvation, kidney damage from inappropriate diuretic use, and bowel problems from laxative abuse. Although bulimia can result in these serious health problems, a sufferer can recover with proper treatment, such as counseling. You can help your sister by alerting trusted adults in your family or community, such as parents, other relatives, teachers, clergy, or doctors. These people may be able to help her get the attention that she needs.
Most bulimics report feelings of shame and develop secretive behaviors to hide their habit.
Your sister's problem probably embarrasses her, but it's important to realize that most bulimics want help. The best thing to do when talking to someone with an eating disorder is to express concern and a willingness to support the person. It's vital that you approach your sister with empathy and patience, as most early attempts to communicate will likely be met with resistance. To get better, bulimics need to commit to treatment, which requires attention from a specialist in eating disorders. Although the underlying cause of bulimia is generally psychological, the physiological side effects require medical treatment.