I have been using fluorouracil cream for five days.. I have not seen much change.. When should I?

I am on day 6 on my lips and I started to see blisters after the 3 rd treatment. Hoping it might not be as bad for you but this is brutal and I have a high pain tolerance. Drinking out of a straw help and glasses of ice water on the lips every so often also helps. Good luck!

Fluorouracil topical is used to treat scaly overgrowths of skin (actinic or solar keratoses). Fluorouracil topical may also be used in the treatment of superficial basal cell carcinoma.
Treatment frequently results in a mild to severe stinging or burning sensation, depending on the sensitivity of the skin, the severity of the sun damage and how long it has been used for. After five to ten days of treatment, the sun-damaged parts of treated skin become red and irritated. As treatment is continued, sores and crusts may appear. These raw areas result from the destruction of defective skin cells. They are a necessary part of treatment. They can be covered with a dressing if you prefer.
Treatment is usually between 2 to 8 weeks long and the skin may look unsightly for a few weeks after treatment completed.