Do I have an allergy if my lip is really bloated? Or can it be because of something else? . I also often itch like crazy all over my body.

Possibly. Lip swelling, or edema, can be from allergic contact hypersensitivity reactions. This could be from food, makeup, or other materials that touch the lip. Also, there can be other forms of allergic hypersensitivity that are more systemic, causing body itching, possibly rash, and swelling of the lips. An non-allergic reaction called angioedema can also cause lip edema, and could be life threatening.