There are several different types of dermatitis. The different kinds usually have in common an allergic reaction to specific allergens. The term may describe eczema, which is also called dermatitis eczema and eczematous dermatitis. An eczema diagnosis often implies atopic dermatitis (which is very common in children and teenagers) but, without proper context, may refer to any kind of dermatitis. In some languages, dermatitis and eczema are synonyms, while in other languages dermatitis implies an acute condition and eczema a chronic one. The two conditions are often classified together.Dermatitis symptoms vary with all different forms of the condition. They range from skin rashes to bumpy rashes or including blisters. Although every type of dermatitis has different symptoms, there are certain signs that are common for all of them, including redness of the skin, swelling, itching and skin lesions and sometimes oozing and scarring. Also, the area of the skin on which the symptoms appear tends to be different with every type of dermatitis. A number of health conditions, allergies, genetic factors and irritants can be responsible for causing dermatitis. There are several types of dermatitis which are distinguished based on the factor that triggers the skin reaction.