Table 2. Characteristics of the researches studying Anger/Aggression in Skin Disorders.

Author	Country	Skin disorder	Sample	Measure	Results
Sayar, Ugurad, Kural, and Acar (2000)	Turkey	Acne	31 acne vulgaris patients and 25 controls	Beck Depression Inventory, State-Trait Anxiety Inventory, Rosenberg Self-Esteem Scale, and Spielberger State-Trait Anger Expression Inventory.	No significant difference was detected on anger-related subscales between the acne and control groups.
Conrad et al. (2008)	Germany	Chronic idiopathic urticaria (CIU) and psoriasis	41 CIU patients 44 psoriasis patients and 49 healthy controls	Alexithymia (TAS-20), emotional distress (SCL-90-R) and anger (STAXI).	Anger was the only significant predictor of pruritus severity in CIU.
Linder et al. (2009)	Italy	Psoriasis	323 patients (aged 18-85 years; mean -SD age 51.2 - 28.7 years)	Interview and a questionnaire developed by clinicians and researchers	Psoriasis elicited anger, annoyance at the inconvenience of the disease, and irritation in approximately 50% of the patients
Kossakowska, Ciescinska, Jaszewska, and Placek (2010)	Poland	Vitiligo and Psoriasis	60 patients with psoriasis (n = 30) and vitiligo (n = 30) as well as healthy persons (n = 60) matched	Watson and Greer’s Courtauld Emotional Control Scale and Kossakowska’s Chronic Patients Questionnaire.	Psoriasis patients control negative emotions more intensively than healthy people. Vitiligo patients do not differ in the control of negative emotions compared with healthy subjects.
Sampogna, Tabolli, and Abeni (2012)	Italy	Psoriasias	936 patients	Skindex-29 questionnaire	The emotions most frequently experienced were: shame, anger, Worry.
Takaki and Ishii (2013)	Japan	Atopic Dermatitis (AD)	43 adult patients with AD, 32 adults with remission from AD, and 63 adults without AD 20-47 years	Anger expression trait scale (AX)	Results indicated a significant impact of anger suppression on depression, in patients with AD.
Altınöz, Taskıntuna, Altınöz, and Ceran (2014)	Turkey	Chronic spontaneous urticaria (CSU) and alopecia areata (AA)	30 CSU 30 AA 30 controls	Hospital Anxiety and Depression Scale and Multi-Dimensional Anger Inventory	More of the CSU patients were observed to respond with excessive anger to most situations, to have high levels of anxiety anger and passive aggressive interpersonal Relationships.
Sarkar, Sarkar, Saha, and Sarkar (2014)	India	Psoriasis	Forty-eight patients of psoriasis and equal number of healthy controls	Self-reporting questionnaire-24 (SRQ-24) and skindex (A 61-item survey questionnaire)	the most common psychiatric morbidity in psoriasis patients was anger (58.3%)
Altunay and Demirci (2015)	Turkey	Pruritus	40 patients with a mean age 46.55±13.20 years	State-Trait Anger Expression Index and the Mini International Neuropsychiatric Interview (M.I.N.I)	Pruritus duration was correlated with anger trait and anger-in subscale scores in all patients.
Aydin et al. (2017)	Turkey	Psoriasis	Eighty-five patients with psoriasis and 86 healthy controls	State-Trait Expression Inventory for Anger (STAXI) and Roserberg Self-esteem Scale (RSES)	Reduced self-esteem and increased anger levels are remarkable in psoriasis patients.
(Coneo, Thompson, & Lavda, 2017)	England	Dermathology patients	ninety-one participant	Optimism (LOT-R), perceptions of social support (SFSSQ) social acceptance, fear of negative Evaluation (FNE), appearance concern (CARVAL/ CARSAL), appearance discrepancy PADQ), social comparison (INCOMM) and wellbeing (HADS) on aggression levels (RAQ)	Anxiety was also found to have a significant positive relationship with aggression (β = 0.356, t = 2.564,p = 0.01).