Generally no. I would be careful of caffeine intake and stick with black or green teas. Herbal teas sometimes contain allergen's.
Perhaps there are some teas that aren't advisable to take (avoid green tea) but they are very few. You should ask a doctor but I think you can drink almost any tea.
Teas
Twinings produces about 200 different kinds of tea, although all these teas are divided into 6 main groups: Classic teas, Origins teas, Black teas, Green teas, Fresh teas and "Herbal and Fruit" teas.
No tea is not harmful to your health. In fact, on the news the other night they feel the darker the tea the better it is for the heart and fighting certain cancers. Green tea and herbal teas are very good for the health as well.
Diuretic teas are those teas which allow the body to release both water and sodium. Some of these teas include: dandelion, yarrow, hawthorn berry, and green tea.
Yogi Tea has over fifty varieties of flavors to choose from. Some of these can include, but not limited to: Green teas, Energy teas, herbal teas, woman's tea, and rest and relax teas.
Black, green and herbal
During the third trimester of pregnancy, it is generally recommended to limit or avoid hibiscus tea. Some studies suggest that hibiscus may have uterine-stimulating properties and could potentially affect blood pressure, which may not be ideal during pregnancy. Always consult with a healthcare provider for personalized advice regarding herbal teas and supplements during pregnancy.
"Dessert Teas" are teas that are best served for dessert. Usually they have a very clean taste, are sweet, and are good for calming the stomach and cleansing the pallatte. The flovors go well with light desserts, like cakes and tarts. Generally, these include but are not limited to: fruit teas, lemonade teas (half and half), green teas, citrus teas, and red tea.
These teas are normally going to be a type of green teas. If you want to know more about all of their variations of teas as well as a great place to buy them, visit orientspiration.com.
Diet teas do exist. Its called Green Tea. Green Team enhances metabolism especially when one is asleep and effectively increases the rate of weight loss.