Most of the blood blisters on the tonsils are related to trauma, such as the toothbrush touching the tonsils when brushing teeth or the chopsticks touching the tonsils when playing on their own, and can also be caused by abnormalities in the coagulation system, causing the tonsils to bleed and form blood blisters. If the blister is large and affects swallowing and breathing, you need to go to the hospital to perform hematoma exclusion surgery. After surgery, you can give anti-inflammatory and hemostatic treatment, such as cephalexin to reduce inflammation, and Anloha to stop bleeding. If the hematoma is small, only antibiotics are needed to control the infection, cefixime can be given orally, and try to avoid stimulating or damaging the hematoma so as not to cause bleeding. The blood blisters will absorb on their own in a week or so, so it is not advisable to pierce them at home to avoid bleeding and infection. If it is caused by the coagulation system, then it is recommended to go to the hematology department for examination and treatment.