###Human: Can clove oil cause this whitish-yellowish kind of blister above the tooth? ###Assistant: Hello. I have gone through the attachment (attachment removed to protect patient identity). The white ulceration on your gums is because of the use of clove oil. Clove oil basically is used to numb the tooth pain but it can lead to irritation around your gums since it is very strong. You need to stop using the clove oil and start with the root canal treatment. For healing of the ulcer, you can start with Chlorhexidine gluconate based mouthwash at least twice a day for a week which will lead to the healing. For more information consult a dentist online -->