hi my son is 10yrs old and has ashtma which is normaly under control we have had quite a few incident where he has needed hospital treatment after coming in to contact with animals his gp refered him to an allergy clinic about 3yrs ago and they did a prick test which confirmed horses and rabbits where the worst as they measured 12 and 13 on the test something to do with the bumps on his arms cats ect were much lower. We control this by keeping him away wherever possible although after his siter visited a farm and sat next to him in the car he again needed treatment for his ashtma and swelling of his face we have been given antihistimines for this. recently we have had quite a few occasions where his face swells for no reason and his eyes almost shut although this hasnt affected his breathing i`m worried that it will butr i have no idea what is the cause of this as he certainly hasnt been in any contact with animals are there any other allergies that could be closely liked with what he allready has? should i ask for more tests?