Final answer:
John Phillips is experiencing an allergic reaction to the yellow jacket stings. Antihistamines and topical creams can be used to relieve itching and inflammation.
Step-by-step explanation:
John Phillips is experiencing an allergic reaction to the yellow jacket stings. The symptoms of intense itching, erythema (redness of the skin), and hives are indicative of an allergic response. First, it is important to ensure that John is not experiencing anaphylaxis, a severe and potentially life-threatening allergic reaction. Signs of anaphylaxis include difficulty breathing, swelling of the face and throat, and dizziness.
If any of these symptoms are present, emergency medical attention should be sought immediately. If John is not experiencing anaphylaxis, the next step is to provide supportive care to relieve itching and inflammation. Over-the-counter antihistamines such as diphenhydramine can help relieve itching. Topical creams or ointments containing hydrocortisone can also be applied to reduce inflammation. Keeping the affected areas cool and avoiding scratching can help prevent further irritation.