Thank you for writing to us,
Repetitive purging of food material and vomiting
it out can cause the acid to damage to the esophageal (food pipe) mucosa. The pale pink description you give of the chunks could possibly be small pieces of eroded mucosa or blood stained food particles. Kindly visit a gastroenterologist to thoroughly investigate your gastro-intestinal system and also a psychiatrist
to help you prevent further damage.
Hope this helps,
Dr A Rao