Urticaria or hives is a condition that is characterized by a raised, itchy rash on the skin. It can spread to a larger area on your body or appear on one part of the body. The condition can appear as a chronic or acute rash. The rash appears when a high level of histamine and other chemical messengers are released in the skin. The blood vessels in the affected area will open up and cause the redness or pinkness in the area. In most cases, hives don't need any treatments since the rash will get better within a few days. If you have any discomfort due to the itchiness, an antihistamine may help you. If you have persistent urticaria, you need to consult a dermatologist immediately. Treatments will involve medications to relieve the symptoms while avoiding potential triggers.