Patients with itchy skin can generally consume kelp. Kelp is a type of seaweed that is low in fat and rich in trace elements like iodine, calcium, and copper. It is highly alkaline and helps maintain the body's acid-base balance. From the perspective of Chinese medicine, kelp has the effects of resolving phlegm, softening hard lumps, clearing heat, and promoting urination. Clinically, it is very rare to see patients allergic to kelp. Therefore, patients with itchy skin can generally eat kelp, unless they are absolutely allergic to it. However, since kelp is cold in nature, it is generally not suitable for people with a cold stomach, pregnant women, or breastfeeding women to consume in large quantities.