According to wat u say it looks like Urticaria... Firstly is there any family history of Asthma or allergies... Have u got any tests done ... Get serum IgE and Absolute eosinophil count tests done
Review with report.
Take photographs wen u have an episode that will help wen u consult doctor
Next Steps
consult Dermatologist
Health Tips
Be gentle with ur skin . Don't use too many cosmetics... Apply coconut oil daily... use like warm water for bath .. Have quick shower...
Apply lots n lots of fragrance free moisturizer
https://youtu.be/tWzh1tt70ak
https://youtu.be/GLJPYCvmfpM
These are videos on my YouTube channel on how to apply n choose Moisturizer
they might be helpful to you