According to Dr Rakesh Jangra, Dermatologist and Hair Transplant Surgeon, Medical Director, Rakshaa Aesthetics, Pitampura, Delhi (India), allergic dermatitis (AD) and contact dermatitis (CD) are two common conditions of dermatitis, but their causes and treatments are very different. Although both cause skin irritation, redness and itching, it is important to distinguish between them for effective treatment.
Causes of the disease
Allergic dermatitis (AD) is a genetic chronic dermatitis that usually begins in young children, causing dryness, itching, and inflammation. The main cause is a genetic defect in the skin barrier.
Contributory dermatitis (CD) occurs when the skin comes into direct contact with irritants such as chemicals or metals. CDs can go away on their own when they avoid irritants. CDs are not hereditary diseases and do not last a lifetime.
Typical symptoms
Allergic dermatitis
Red, itchy rashes, dry skin, peeling or scaly skin appear.
The disease is recurring, often lasting and appearing in areas such as the face, neck, elbows and knees.
Patients often have a family history of allergic diseases such as asthma, allergic rhinitis or eczema.
Contact dermatitis
The skin area in contact with the agencies will become red, itchy, and may have blisters or scales.
The reaction occurs within a few hours to a few days after contact with the pathogen.
The affected area is primarily the area that comes into direct contact with the reacting substances, such as the hands, face or skin exposed to chemicals.
The disease development process
Allergic dermatitis: This is a chronic disease that can recur many times, especially during changing weather seasons or when the body is exposed to allergens. The disease requires long-term treatment and symptom control.
Contact dermatitis: The reaction can go away on its own when avoiding contact with irritants or allergens. If the disease recurs, it is necessary to identify and avoid contact with allergens.
Diagnosis and treatment
Allergic dermatitis: Diagnosis is mainly based on clinical symptoms and a family history of allergic diseases. Treatment usually includes anti- histamine, moisturizer, and anti-inflammatory drugs.
Contact dermatitis: It is necessary to clearly identify the pathogens through a history of exposure to allergens or irritants and patch tests. Treatment includes staying away from pathogens and using anti-inflammatory drugs and anti- histamine drugs.
