Key Takeaways
- Approximately 31.6 million people in the United States, or 10.1% of the population, are affected by eczema, with higher rates among children under 18 at 13.1%
- Globally, eczema affects over 200 million people, making it the most common inflammatory skin disease worldwide
- In the UK, 1 in 5 children and 1 in 10 adults develop eczema, with prevalence rates peaking at 20% in children aged 1-5 years
- Atopic dermatitis, the most common eczema type, features intense itching as primary symptom affecting 90% of patients
- Red, inflamed, scaly patches on skin, often on face, elbows, knees, appear in 80% of childhood eczema cases
- Dry, cracked skin that bleeds occurs in severe eczema, with oozing and crusting in 50% acute flares
- Genetic mutations in filaggrin gene cause barrier dysfunction in 20-30% severe eczema
- Family history of atopy increases risk 3-fold; if both parents affected, 60-80% child risk
- Early-life exposure to allergens like dust mites elevates risk by 1.5-2 times
- Topical calcineurin inhibitors effective in 80% moderate-severe cases
- Topical corticosteroids tiered: mild 1% hydrocortisone for face, potent clobetasol for body
- Wet wrap therapy with emollients/corticosteroids improves SCORAD by 70% in 7 days
- Severe eczema increases risk of asthma by 2-3 fold, atopic march
- Bacterial skin infections occur in 90% of severe eczema flares due to barrier breach
- Eczema herpeticum, disseminated HSV, mortality 1-9% untreated
Eczema is a widespread, often severe global skin condition affecting millions of people.
Causes and Risk Factors
- Genetic mutations in filaggrin gene cause barrier dysfunction in 20-30% severe eczema
- Family history of atopy increases risk 3-fold; if both parents affected, 60-80% child risk
- Early-life exposure to allergens like dust mites elevates risk by 1.5-2 times
- Low vitamin D levels (<20 ng/mL) associate with 1.8x higher eczema odds in infants
- Breastfeeding for >3 months reduces eczema risk by 27% in high-risk infants
- Staphylococcus aureus colonization on skin in 90% eczema patients vs 5% healthy
- Urban living increases eczema risk 1.4-fold due to pollution exposure
- Maternal smoking during pregnancy raises child eczema risk by 30-50%
- Filaggrin loss-of-function mutations in 27% European eczema patients
- Probiotic use in pregnancy reduces eczema incidence by 20% in meta-analysis
- High maternal intake of omega-3 fatty acids lowers child eczema risk 17%
- Daycare attendance before 1 year increases eczema risk 1.6x via infections
- Obesity BMI>30 associates with 1.5x adult eczema prevalence
- Hard water (>100 mg/L CaCO3) exposure raises risk 87% in infants
- Cesarean delivery increases eczema risk 1.3-fold vs vaginal birth, microbiome effect
- Early antibiotic use (<6 months) triples eczema development risk
- Pets in home during infancy protect against eczema, OR 0.7, hygiene hypothesis
- Stressful life events double eczema flare risk via cortisol dysregulation
- Soy formula feeding in infancy increases eczema 1.5x vs cow's milk
- Climate: cold dry winter air exacerbates eczema 2x more than humid tropics
- Immune dysregulation Th2 skewing in 80% atopic eczema, IL-4/13 elevated
- Contact allergens like nickel sensitize 15-20% hand eczema cases
- Food allergens trigger 30% infantile eczema, cow's milk/egg common
- Sleep deprivation from pruritus creates vicious cycle, worsening barrier in 70%
- Textile irritants like wool provoke flares in 25% sensitive patients
- Vitamin D deficiency OR 2.1 for eczema in meta-analysis of 21 studies
Causes and Risk Factors Interpretation
Complications and Prognosis
- Severe eczema increases risk of asthma by 2-3 fold, atopic march
- Bacterial skin infections occur in 90% of severe eczema flares due to barrier breach
- Eczema herpeticum, disseminated HSV, mortality 1-9% untreated
- Chronic sleep loss from pruritus raises obesity risk 60% in children
- Allergic contact dermatitis overlays in 40% chronic hand eczema cases
- Severe eczema associates with ADHD diagnosis 1.7x higher odds
- Kaposi's varicelliform eruption (eczema vaccinatum) post-vaccination rare, 0.01%
- Growth retardation in 20% severe untreated pediatric eczema
- Depression prevalence 25% in adult moderate-severe eczema vs 7% general
- Osteoporosis risk elevated 1.5x from chronic topical steroid use
- Food allergy develops in 25% eczema infants, egg/milk common
- Eczema increases anaphylaxis risk 6-fold in sensitized patients
- Scarring alopecia from scalp eczema in 5% chronic cases
- Cardiovascular disease risk 1.3x higher in severe eczema adults
- Antibiotic resistance S. aureus MRSA in 20% colonized eczema patients
- Anxiety disorders 2x prevalence in pediatric eczema cohort studies
- Visual impairment from chronic eyelid eczema 10% severe cases
- Rheumatoid arthritis comorbidity OR 1.7 in atopic eczema
- 30% of childhood eczema persists into adulthood, worse prognosis if early onset
- Healthcare costs for eczema $29 billion annually in US, mostly severe cases
- School absenteeism 15% higher in children with eczema vs controls
- Chronic urticaria coexists in 18% adult eczema patients
- Lymphoma risk slightly elevated RR 1.4 in severe long-term eczema
- Pneumonia hospitalization 1.6x in severe eczema children, infection prone
- Quality of life DLQI scores average 10.5 in moderate eczema, comparable psoriasis
- Work productivity loss 25% in adult hand eczema sufferers
- Otitis media recurrent 2x frequency in atopic eczema toddlers
- Cataract formation risk 1.9x from topical/ systemic steroids long-term
- Social stigma leads to bullying in 27% school-age eczema children
- Migraine headache prevalence 1.5x in adult eczema population
Complications and Prognosis Interpretation
Prevalence and Epidemiology
- Approximately 31.6 million people in the United States, or 10.1% of the population, are affected by eczema, with higher rates among children under 18 at 13.1%
- Globally, eczema affects over 200 million people, making it the most common inflammatory skin disease worldwide
- In the UK, 1 in 5 children and 1 in 10 adults develop eczema, with prevalence rates peaking at 20% in children aged 1-5 years
- Eczema prevalence in the US has increased by 60% over the past 30 years, from 6.5% in 1988 to 10.7% in 2018 among children
- Among African American children in the US, eczema prevalence is 19.3%, compared to 12.1% in white children, showing racial disparities
- In Australia, 30% of children under 6 years old have eczema, one of the highest rates globally
- Eczema affects 15-20% of children worldwide, with 60% developing symptoms in the first year of life
- In urban areas of developing countries like India, eczema prevalence in children is 12.5%, higher than rural 8.2%
- Lifetime prevalence of eczema in Europe ranges from 15-30% in children and 2-10% in adults
- In Japan, hand eczema affects 10% of the general population, with occupational cases comprising 90% of adult consultations
- Eczema prevalence among US adults is 7.2%, with women affected at 8.2% versus 6.2% in men
- In China, childhood eczema prevalence has risen to 9.2% from 4.1% in the 1990s due to urbanization
- Severe eczema impacts 1.3% of US children, leading to 1,500 emergency visits per 100,000 cases annually
- In Scandinavia, eczema prevalence in children is 25%, linked to cold climates and hygiene practices
- Global burden of eczema measured in DALYs is 1.3 million, ranking it among top 20 skin diseases
- In low-income countries, eczema prevalence is 7.9% in children, lower than high-income 18.1%
- US military personnel show 12% eczema prevalence, higher due to stress and exposures
- In South Korea, 23.8% of elementary school children have eczema, per ISAAC study
- Eczema remission occurs in 60-70% of children by adolescence, but 30% persist into adulthood
- In Brazil, urban eczema prevalence in children is 18.6%, influenced by pollution
- African children have 20.4% eczema prevalence, highest among ethnic groups globally
- In Canada, 10.5% of adults report doctor-diagnosed eczema
- Singapore reports 22% childhood eczema rate, among Asia's highest
- Eczema affects 16.5% of US children with food allergies, comorbidity rate
- In Germany, adult eczema prevalence is 4.5%, with 2 million cases annually
- Global pediatric eczema incidence is 15%, with 40% family history
- In New Zealand, Maori children have 23% eczema vs 11% in Europeans
- US eczema healthcare visits total 12 million annually, mostly pediatric
- In Sweden, 20% of 2-year-olds have eczema, decreasing to 7% by age 12
- Worldwide, eczema causes 68 million prescriptions yearly in high-income countries
Prevalence and Epidemiology Interpretation
Symptoms and Clinical Features
- Atopic dermatitis, the most common eczema type, features intense itching as primary symptom affecting 90% of patients
- Red, inflamed, scaly patches on skin, often on face, elbows, knees, appear in 80% of childhood eczema cases
- Dry, cracked skin that bleeds occurs in severe eczema, with oozing and crusting in 50% acute flares
- Intense nocturnal pruritus disrupts sleep in 60% of children with moderate-severe eczema
- Flexural eczema in adults typically affects antecubital fossae in 70% of cases
- Lichenification from chronic scratching seen in 40% long-term patients, thickening skin
- Eyelid eczema causes swelling and scaling in 25% of facial involvement cases
- Hand eczema presents with vesicles, fissures, hyperkeratosis in 80% occupational cases
- Nummular eczema shows coin-shaped lesions 1-10cm diameter, pruritic in 90%
- Asteatotic eczema in elderly features fish-scale cracking on shins, 30% over 65
- Perioral dermatitis mimics eczema with papules around mouth in 15% misdiagnosed
- Excoriations from scratching lead to secondary infection signs in 70% flares
- Pruritus intensity scores average 7/10 on VAS in moderate eczema
- Erythema grading: mild (pink), moderate (red), severe (deep red/purple) in SCORAD system
- Sleep disturbance measured by SCORAD-A component affects 85% severe cases
- Facial eczema in infants covers cheeks in 95%, sparing diaper area
- Dyshidrotic eczema on palms/soles shows tapioca-like vesicles in 60%
- Post-inflammatory hyperpigmentation follows flares in 50% darker skin types
- Nipple eczema in breastfeeding women causes fissuring, pain in 10-20%
- Ear eczema leads to otitis externa in 30% untreated cases
- Scalp eczema presents with greasy scales, itching in 40% seborrheic overlap
- Foot eczema fissures cause pain on walking in 25% chronic cases
- Photosensitivity worsens eczema in 20% patients with polymorphic light eruption
- Xerosis precedes flares in 90% atopic eczema patients
- Anhidrosis in affected areas reduces sweating, exacerbating heat in 15%
- Oral allergy syndrome overlaps with lip eczema in 35% food-allergic patients
- Ichthyosis vulgaris coexists with eczema in 50% cases, rough dry skin
- Acute eczema shows weeping vesicles, subacute plaques, chronic lichenified
- Eczema herpeticum presents clustered vesicles, fever in 5% severe atopic
Symptoms and Clinical Features Interpretation
Treatments and Management
- Topical calcineurin inhibitors effective in 80% moderate-severe cases
- Topical corticosteroids tiered: mild 1% hydrocortisone for face, potent clobetasol for body
- Wet wrap therapy with emollients/corticosteroids improves SCORAD by 70% in 7 days
- Dupilumab, IL-4/13 inhibitor, clears 38% severe eczema patients at 16 weeks
- Daily emollient use from birth prevents eczema in high-risk infants by 50%, BEEP trial
- Crisaborole PDE4 inhibitor reduces symptoms 32% vs 25% vehicle at 4 weeks
- Narrowband UVB phototherapy achieves 75% improvement in 60% chronic cases
- Oral cyclosporine induces remission in 60% severe refractory eczema short-term
- Bleach baths (0.5 cup/8L water) reduce S. aureus 50%, flares by 1/3
- Abrocitinib JAK1 inhibitor clears EASI-75 in 44% vs 8% placebo at 12 weeks
- Upadacitinib JAK inhibitor achieves 80% EASI-75 in phase 3 trials
- Tralokinumab IL-13 mAb improves IGA 0/1 in 16% vs 7% placebo at 16 weeks
- Oral methotrexate 10-15mg/week effective in 40% refractory pediatric cases
- Probiotics Lactobacillus rhamnosus reduce eczema risk 50% in high-risk infants
- Antihistamines like hydroxyzine aid sleep but minimal itch relief, 20% adjunct benefit
- Allergen immunotherapy reduces eczema flares 40% in pollen-sensitized
- Calcineurin inhibitors tacrolimus 0.1% ointment clears 70% facial eczema
- Wet dressings with diluted vinegar soothe acute flares, 60% patient satisfaction
- Oral steroids prednisone short burst for severe flares, relapse 50% within week
- House dust mite avoidance measures reduce symptoms 30% in sensitized children
- PDE4 inhibitor roflumilast cream 0.15% EASI-50 42% vs 20% vehicle
- Baricitinib JAK inhibitor IGA 0/1 16% at week 16 phase 3
- Educational programs improve adherence, reduce flares 35%
- Dilute sodium hypochlorite baths decrease infection rates 50%
- Azathioprine 2-3mg/kg/day remission 50-70% severe cases, monitor TPMT
- Psychological interventions CBT reduce itch 30% via stress management
- Manuka honey dressings heal infected eczema 80% faster than standard
- Eczema herpeticum requires IV acyclovir, mortality <1% with prompt tx
- Sleep hygiene plus melatonin improves quality 40% in pediatric eczema
Treatments and Management Interpretation
Sources & References
- Reference 1NATIONALECZEMAnationaleczema.orgVisit source
- Reference 2WHOwho.intVisit source
- Reference 3ECZEMAeczema.orgVisit source
- Reference 4CDCcdc.govVisit source
- Reference 5JACIONLINEjacionline.orgVisit source
- Reference 6ALLERGYallergy.org.auVisit source
- Reference 7NCBIncbi.nlm.nih.govVisit source
- Reference 8IJDVLijdvl.comVisit source
- Reference 9EUROSTATeurostat.ec.europa.euVisit source
- Reference 10JSTAGEjstage.jst.go.jpVisit source
- Reference 11THELANCETthelancet.comVisit source
- Reference 12PUBMEDpubmed.ncbi.nlm.nih.govVisit source
- Reference 13ACADEMICacademic.oup.comVisit source
- Reference 14JAADjaad.orgVisit source
- Reference 15SCIELOscielo.brVisit source
- Reference 16CANADAcanada.caVisit source
- Reference 17ANNALSannals.org.sgVisit source
- Reference 18JACI-GLOBALjaci-global.orgVisit source
- Reference 19JDDGjddg.deVisit source
- Reference 20NZMAnzma.org.nzVisit source
- Reference 21JAMANETWORKjamanetwork.comVisit source
- Reference 22MEDICALJOURNALSmedicaljournals.seVisit source
- Reference 23GBDXgbdx.ioVisit source
- Reference 24MAYOCLINICmayoclinic.orgVisit source
- Reference 25AADaad.orgVisit source
- Reference 26DERMNETNZdermnetnz.orgVisit source
- Reference 27CONTACTDERMcontactderm.orgVisit source
- Reference 28JACI-INPRACTICEjaci-inpractice.orgVisit source
- Reference 29EAACIeaaci.orgVisit source
- Reference 30ONLINELIBRARYonlinelibrary.wiley.comVisit source
- Reference 31PEDIATRICSpediatrics.orgVisit source
- Reference 32BMJbmj.comVisit source
- Reference 33PODIATRYTODAYpodiatrytoday.comVisit source
- Reference 34JIDONLINEjidonline.orgVisit source
- Reference 35AAAAIaaaai.orgVisit source
- Reference 36NATUREnature.comVisit source
- Reference 37NEJMnejm.orgVisit source
- Reference 38COCHRANELIBRARYcochranelibrary.comVisit source
- Reference 39JINVESTDERMATOLjinvestdermatol.comVisit source
- Reference 40AJCNajcn.nutrition.orgVisit source
- Reference 41PEDIATRICSpediatrics.aappublications.orgVisit source
- Reference 42JPEDSjpeds.comVisit source
- Reference 43JPSYCHOSOMRESjpsychosomres.comVisit source
- Reference 44JAMADERMATOLOGYjamadermatology.comVisit source
- Reference 45AAFPaafp.orgVisit source
- Reference 46WOUNDSINTERNATIONALwoundsinternational.comVisit source
- Reference 47AHAJOURNALSahajournals.orgVisit source
- Reference 48ARDard.bmj.comVisit source
- Reference 49JEURAXRESjeuraxres.orgVisit source
- Reference 50AJPajp.comVisit source






