Just because turmeric is a "natural" product, it does not mean that it is free from side effects. Some of the possible side effects of turmeric include nausea and diarrhea. However, turmeric has not been extensively studied, so there is little information available about what possible side effects this product may cause. You should seek immediate medical attention if you develop any serious side effects of turmeric, including any signs of bleeding or liver problems.
(To read more, click Turmeric Side Effects. This article takes an in-depth look at other possible side effects of turmeric, including the side effects that require medical attention.)