Having a skin allergy along with cough and cold symptoms can often be due to an overall allergic reaction (such as Allergic Rhinitis with Urticaria) triggered by dust, weather changes, or certain foods, but it can also occur during viral infections where the immune system is active. Treatment mainly involves avoiding triggers like dust, smoke, and strong fragrances, staying well hydrated, and taking antihistamine medicines (as advised by a doctor) to reduce itching and allergy symptoms; soothing lotions like calamine can help the skin, while steam inhalation and simple cold remedies can ease cough and nasal symptoms. Most cases improve with these measures, but if the rash is severe, persistent, or associated with swelling of the face, breathing difficulty, or high fever, you should seek medical care promptly for proper evaluation and treatment.