The bulging of refrigerator is generally caused by the expansion of enclosed air inside, which does not affect the use, but for the sake of beauty and protection of refrigerator, you can try the following treatment methods:

1. Clean the surface of the refrigerator to ensure that there is no dust and debris.

2. Try to expose the bump to sunlight, which will make the bump deform and shrink and eventually disappear.

3. Soak the towel in warm water, wring it out and apply it on the raised surface. After cooling, take it off and repeat this operation several times, and the raised surface will gradually disappear.

4. Use a hair dryer or hot towel to blow hot air on the bulge, and massage while blowing until the bulge disappears.

5. If the above methods are not effective, you can try to gently pierce the protrusion with a needle and flatten it with your hand, being careful not to break the protrusion.

The above methods are for reference only. If it still can't be unblocked, it is recommended to contact after-sales service for professional technical support.