The quick answer is no, you are more likely to get sick from an avocado if it is overripe and has turned bad. If you eat an avocado that has not yet become ripe, it will not cause you any health issues. This is because avocado that has not yet become ripe is not a toxic food and therefore will not negatively affect your body. If you eat a large amount of avocado that has not yet become ripe then you could experience an upset stomach or diarrhea due to the large amount of fiber that avocados contain.