Allergic dermatitis means itchy skin. But skin shows allergy only after prolonged exposure to it, this is due to our resistance power. The most common allergens are nickel, rubber, perfumes, iron etc. Sometimes skin become allergic to particular vegetables and flowers also. We can observe the redness and itching on the contacted part first and ten it spreads over. A different part of the body becomes allergic by different allergens. The face and neck suffer from allergy due to cosmetics and jewelry. Inaxilla we have allergy due to deodorants and clothes. Allergy on the wrist can be due to the mental band of the wrist watch. Some can also be allergic to ointments which are externally applied for piles. Hair dye can also cause itching and corruption in the scalp. How much we react to the allergen depends on our resistance power and immunity. As we know that we can get rid of allergy by only two ways;
1] Keep yourself if away from the allergen
2] Improve your immunity, by building it up to that level where the allergensa do not affect.
It cannot attack on your body and as we all know the basic law of homoeopathy is to improve immunity after taking proper care and that will proper care and that will protect your body from every external attack of allergy.