Granulation tissue growing between nails is usually caused by ingrown toenails. Ingrown toenails are usually caused by improper nail trimming or nail trimming that is too short, or sometimes due to trauma.
If there is less granulation tissue, less swelling, and no obvious pain, you can wait for the nail to slowly grow upward and apply iodophor locally.
If there is a lot of granulation tissue growing, severe redness and swelling, severe pain, or even leakage, you need to go to the hospital in time. Doctors usually remove part of the granulation tissue under local anesthesia, and remove part of the nail at the same time, and then it can grow back through regular dressing changes. While the nail is not healing, the area should not be wet, eat too spicy food, or drink alcohol.