Please choose the correct ending to complete the given sentence: Health: [header] How to treat hives naturally [title] Understand what causes the hives. [step] Anyone can get hives. About 20% of the population have experienced them at some point in their lives.

Ending1: But many people experience hives during unexpected, early days of work. Hives often indicate that someone is engaging in activity or discomfort. Ending2: Hives, between the ages of thirty and fifty, are usually your peak risk. The other 50% of people experience hives from age 7 to 10 and determine that about 2% of teenage girls have hives. Ending3: During an allergic reaction, certain skin cells, such as the mast cells that contain histamine and other chemical messengers like cytokines, are stimulated to release the histamine and other cytokines. These increase the amount of leakage from the tiny blood vessels in the skin and cause the swelling and itching that is so characteristic of hives. Ending4: However, there are many different conditions on the spectrum, such as : [substeps] Hives such as eczema, sensitive skin, by being itchy, or manically infected. It may be at any one time of the year, such as halloween, or at some other time due to low doses of menstrual hormones which can cause hives to form hives at any time of the year.

Answer format: ending1/ending2/ending3/ending4