A combination of compensatory behaviours - When someone is vomiting and taking laxatives excessively. When behaviours are excessive and binge/purge cycles are extreme.
Excessive exercise and low weight - If low weight and exercise are combined, all organs may be compromised and the heart will struggle to cope.
Blood in vomit - This can be life threatening and may indicate the oesophagus has ruptured.
Inadequate fluid intake - Dehydration is a key factor in any age group. If dehydrated, the kidneys may fail and other organs may be compromised.
Rapid weight loss - All organs may be compromised if weight loss is rapid.
Disrupting food rituals (eg: journey, holiday, exam). This can compromise the body's vital organs if someone is already very underweight due to an eating disorder and they go without food or drink.
Low potassium levels due to excessive vomiting/laxatives. Again, this may be a medical risk factor. If compensatory behaviours are out of control and someone is vomiting or using laxatives in excess then the heart may be damaged.
Potassium - Bloods need to be taken in the case of someone suffering from Anorexia (BET) 3.5 to 5.2 is regarded as normal. Anything below 3 creates the circumstances to admit that person to hospital.