Hi..
Itchy welts on the forehead seems to be most probably due to
allergic reaction and it can b due to a number of causes and despite of metal allergy it can also be due to any skin cosmetics, wile it can be due to any foods or medicine and even leather, latex can be a cause..
I would suggest you to consult an Allergist and get evaluated and a thorough clinical evaluation and investigations like allergic tests like
Patch test, RAST test, food challenge test etc can help in diagnosis and treatment can be done accordingly..
The tests will help in ruling out the exact cause of the allergen and once you know the cause of the allergic reaction you can avoid exposure to it to prevent allergy attack..
The allergist can advise to oral anti allergics as well as injectable
steroids for relief..
As of now you can take anti-allergics like Levocetrizine,
Allegra to control the itching and swelling..
Do cool compresses..
Application of
calamine lotion can help in soothing the skin..
Hope I have answered your query. Let me know if I can assist you further.
Regards,
Dr. Honey Arora,
Dentist