3.5 year old girl with symptoms of mild urticaria.

My 3.5 year old daughter suffered from mild urticaria for 4 days during vocations by the sea. Liitle warts with redness, quite itchy but not expanding. We don't know the cause but after the urticaria had gone, I noticed that when she get stressed or gets angry or emotionally strained the urticaria comes back in her face or arms and leaves her after 30 minutes.
A few things about her:

She had persistent eczema in her right cheek since the age of 4 months. She has also dermographism, She is quite social, sensitive, and very persistent, her face becomes quite red when angry, sleeps well and a lot, generally does not fear things and has rather warm feet during sleep.. Forgot to mention that I (her father) suffer from severe chronic urticaria the last 8 years but sulphur has been a very good remedy for me for this problem.
Thank you in advance.

PS: Dr Abhishek had proposed BC 20 of Dr Reckeweg for her eczema with good results.
Kawda had proposed lycopodium and then sulphur but did not try it since the eczema left her.