What is systemic contact dermatitis?
Rachel Newton
Updated on February 28, 2026
Systemic contact dermatitis (SCD) traditionally refers to a skin condition where an individual who is cutaneously sensitized to an allergen will subsequently react to that same allergen or a cross reacting allergen via a different route. It occurs to allergens including metals, medications, and foods.
Correspondingly, what is a systemic reaction?
When a reaction stays with one area of the body, it's known as a localized reaction. When inflammation spreads from a localized area of one organ (like the skin) to other organ systems in the body, it's known as a systemic reaction. The inflammation can be from toxins, allergies or infections.
Furthermore, how do you treat systemic dermatitis? Over-the-counter creams and ointments containing a mild topical steroid, such as hydrocortisone 0.5–2.5%, may be used to help control itching, swelling, and redness. In more severe cases, a prescription topical steroid cream may be required, as well as antibiotics if the skin becomes blistered and infected.
Also Know, how long does systemic dermatitis last?
To treat contact dermatitis successfully, you need to identify and avoid the cause of your reaction. If you can avoid the offending substance, the rash usually clears up in two to four weeks.
What can trigger contact dermatitis?
Common causes of irritant contact dermatitis include:
- Acids.
- Alkalis like drain cleaners.
- Body fluids, including urine and saliva.
- Certain plants, such as poinsettias and peppers.
- Hair dyes.
- Nail polish remover or other solvents.
- Paints and varnishes.
- Harsh soaps or detergents.
Related Question Answers
What causes systemic dermatitis?
Systemic contact dermatitis (SCD) traditionally refers to a skin condition where an individual who is cutaneously sensitized to an allergen will subsequently react to that same allergen or a cross reacting allergen via a different route. It occurs to allergens including metals, medications, and foods.What causes a systemic rash?
Body's systemic inflammationThe body's own systemic inflammation can cause maculopapular rashes. Inflammation is how your body responds to an injury or infection. A drug reaction, infection, an autoimmune response, or allergic reaction can cause your body's immune system to respond and develop maculopapular rashes.
Can contact dermatitis become chronic?
Irritant contact dermatitis (ICD) is a nonspecific, nonallergic response of the skin to direct chemical damage from a corrosive agent that releases mediators of inflammation predominantly from epidermal cells. Irritant contact dermatitis can be acute or chronic.How does allergic contact dermatitis occur?
Allergic contact dermatitis occurs when the skin develops an allergic reaction after being exposed to a foreign substance. This causes the body to release inflammatory chemicals that can make the skin feel itchy and irritated.What does it mean if something is systemic?
: of, relating to, or common to a system: such as. a : affecting the body generally systemic diseases. b : supplying those parts of the body that receive blood through the aorta rather than through the pulmonary artery.What does a histamine reaction look like?
A histamine intolerance looks like a lot like seasonal allergies — if you eat histamine-rich food or drinks, you may experience hives, itchy or flushed skin, red eyes, facial swelling, runny nose and congestion, headaches, or asthma attacks.Can contact dermatitis spread if you scratch it?
Scratching the affected area generally does not relieve the itching. It can spread the allergen and the contact dermatitis rash to other areas of the body, such as contact dermatitis related to poison ivy or poison oak. Scratching can also lead to increased inflammation, more intense itching, and harder scratching.How do you get rid of contact dermatitis fast?
To help reduce itching and soothe inflamed skin, try these self-care approaches:- Avoid the irritant or allergen.
- Apply an anti-itch cream or lotion to the affected area.
- Take an oral anti-itch drug.
- Apply cool, wet compresses.
- Avoid scratching.
- Soak in a comfortably cool bath.
- Protect your hands.
Can dermatitis spread from person to person?
Even if you have an active rash, you can't pass the condition on to someone else. If you think you've gotten eczema from someone else, you likely have another skin condition. However, eczema often causes cracks in the skin, leaving it vulnerable to infection. This secondary infection may be contagious.Where on the body does irritant contact dermatitis most frequently start?
ICD occurs in the area where the offending chemical touches the skin. Any part of the skin can be affected. The hands and feet are commonly affected but ICD can occur on the face or elsewhere on the body.Where should you not use hydrocortisone cream?
Only use hydrocortisone skin treatments on children under 10 years old if a doctor recommends it. Creams you can buy are not supposed to be used on the eyes, around the bottom or genitals, or on broken or infected skin.How long does a systemic allergic reaction last?
This early or immediate response peaks at about 15 minutes and symptoms fade within 90 minutes. Sometimes, the immediate effects are followed by a late-phase reaction with symptoms occurring about four to six hours later and lasting up to a day.What are systemic treatments?
Systemic therapies are drugs that spread throughout the body to treat cancer cells wherever they may be. They include chemotherapy, hormonal therapy, targeted drugs, and immunotherapy. Memorial Sloan Kettering is a leading center for the development of innovative systemic therapies for breast cancer.Can contact dermatitis give you a fever?
You have symptoms of contact dermatitis. The skin reaction is severe. You do not get better after treatment. Signs of infection such as tenderness, redness, warmth, or fever.How common are systemic reactions to allergy shots?
Systemic reaction are rare when following a conventional protocol, with a prevalence of less than 1.0% of patients and 0.1% of injection visits [4].Can aspartame cause eczema?
Formaldehyde. Formaldehyde from aspartame, an artificial sweetener, may cause eyelid or hand eczema in those who are allergic. Aspartame converts to formaldehyde, which is also one of the most common contact allergens found in skin and haircare products, in the liver as it metabolizes in your body.What are the symptoms of a systemic anaphylactic reaction?
Symptoms- Skin reactions, including hives and itching and flushed or pale skin.
- Low blood pressure (hypotension)
- Constriction of the airways and a swollen tongue or throat, which can cause wheezing and trouble breathing.
- A weak and rapid pulse.
- Nausea, vomiting or diarrhea.
- Dizziness or fainting.
