As per your history , it appears that she suffering from chronic urticaria. Since it’s also associated with asthma,
thyroid as well. I suggest we evaluate her thoroughly. Meanwhile, start noting the things she is allergic to, it can be dust , pollen , temperature or pressure change, sweating, food items or medicines.
Next Steps
You may go a direct consultation for further management and prescription.
Health Tips
Keep the skin hydrated and moisturised helps skin fight of allergies, so do apply a body lotion or coconut oil regular after bathing and use syndet soap instead of regular soap to maintain skin ph.