Sweet tea, also known as dandelion tea, is a tea made from dandelion flowers or roots. It is believed to have a variety of health benefits, including lowering cholesterol, protecting the liver, anti-inflammatory, diuretic and antioxidant. However, there may be contraindications to consuming sweet tea for certain groups of people.

The following are some of the possible contraindications:

1. Liver disease: Sweet tea may interfere with medications and cause more serious effects in people with liver disease.

2. Medication: If you are taking medication, drinking sweet tea may interact with some medications and affect their efficacy and safety. Especially antibiotics, tranquilizers and antiplatelet drugs.

3. Pollen allergies: Drinking sweet tea may cause allergic reactions such as wheezing, throat tightness, and itchy skin in people who are sensitive to pollen from dandelion flowers and/or other related plants.

4. Kidney disease: Sweet tea has a diuretic effect and long-term consumption may cause damage to the kidneys.

5. People who damage the cervical spine: when drinking sweet tea, be careful to avoid tilting your head forward, otherwise it will cause more pressure and discomfort to people who damage the cervical spine.

All in all, if you are drinking sweet tea or other plant teas before you have any concerns, it is best to consult your doctor or dietitian. And always keep your tea consumption moderate.