The causes of tooth sensitivity after having a crown fitted are tooth allergy, inflammatory reaction, etc. According to different causes, desensitization treatment, daily care and medication can be used to eliminate the disease. 1. Tooth allergy: Generally speaking, if the adhesive crown material causes local irritation when installing crowns, it will easily lead to sensitivity. For this condition, you should pay close attention to the patient’s dental condition and avoid eating foods that are too acidic or cold. If the condition still does not improve, desensitization treatment is needed. For example, laser stimulation of the sensitive areas, followed by the use of continuous desensitizing toothpaste to keep the dentin tubules in a closed state. 2. Inflammatory reaction: After the installation of dental crowns, if the local inflammation, also easy to cause tooth sensitivity. It is recommended to use cotrimoxazole rinse and nitazole rinse to control the condition under the guidance of healthcare professionals. Meanwhile, use a soft-bristled brush to clean the teeth regularly to avoid the continued invasion of bacteria. The installation of dental crowns can strengthen the resistance of teeth and repair large defects, which is a common treatment for dental diseases. However, after the installation, if the discomfort reaction occurs, you should seek medical attention as soon as possible to find out the condition and not to delay the condition.