Side effects from drinking ginger tea may include mouth irritation, heartburn, gas and upset stomach, and it can also increase the risk of bleeding in those who have bleeding disorders. Consuming ginger tea with less than 5 grams of ginger per day is likely to only cause only mild side effects.
Consuming ginger tea while pregnant or having health conditions such as diabetes or heart problems can pose health risks. Ginger tea can also interact with blood thinners and medications taken by those with diabetes. While ginger can cause some side effects, WebMD states that there is significant medical evidence indicating that is it helpful in reducing pain associated with headaches, joint pain, muscle pain, rheumatoid arthritis and osteoarthritis, while it may also help to lower blood sugar, lessen swelling, prevent blood clotting and lower cholesterol. Ginger is a spice found throughout the world in warm climates, and it has been harvested for its valuable root for thousands of years.