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You seem to be having symptoms of Bullemia nervosa. When you do such things, there is high risk of acid damage to your mouth, teeth causing discolouration and unhealthy teeth, oral cavity. This is an extremely disturbing habit to adopt. Rather you can eat healthy. Avoid junk food. Exercise daily for good health and physique. Having tremor
can occur when you have low blood sugar
due to frequent vomiting
. Avoid this situation or you can faint, develop seizures as well. You may need Psychiatrist's advice to help you quit this.