Related Experiment Video
Updated: Mar 14, 2026
04:59
Cheek Injection Model for Simultaneous Measurement of Pain and Itch-related Behaviors
Published on: September 27, 2019
13.2K
Pruritus since childhood.
Andrea Richardson1, Richard P Usatine1
1University of Texas Health Science Center at San Antonio, TX, USA.
The Journal of Family Practice
|September 28, 2016
Summary
An itchy rash, initially diagnosed as psoriasis, resisted standard treatments. Further investigation was needed to identify the underlying cause of persistent pruritus.
Area of Science:
- Dermatology
- Clinical Medicine
Background:
- Psoriasis is a chronic autoimmune condition.
- It often presents with itchy, inflamed skin lesions.
Observation:
- A patient presented with a persistent itchy rash.
- The rash was previously diagnosed as psoriasis.
- Standard psoriasis treatments offered minimal relief.
Findings:
- The underlying cause of the pruritus was not psoriasis.
- An alternative diagnosis was identified.
Implications:
- Accurate diagnosis is crucial for effective treatment.
- Re-evaluation of treatment-resistant dermatological conditions is important.
Related Concept Videos
01:16Accessory Structures of the Skin: Hair and Hair Follicles
5.3K
Hair and hair follicles are integral components of the integumentary system. Hair is a filamentous structure composed mainly of a protein called keratin. It is found on the surface of the skin throughout the body, except for areas such as the palms of the hands and soles of the feet.
Hair is a keratinous filament growing out of the epidermis. It is primarily made of dead, keratinized cells. Hair strands originate at the epidermal penetration called the hair follicle. The hair shaft is the part...
Hair is a keratinous filament growing out of the epidermis. It is primarily made of dead, keratinized cells. Hair strands originate at the epidermal penetration called the hair follicle. The hair shaft is the part...
5.3K
01:26Psychosexual Stages of Personality: Anal
4.7K
Sigmund Freud's theory of psychosexual development describes the anal stage as occurring between 18 months and three years of age. During this period, children derive pleasure from controlling and releasing their bowel movements. However, they quickly learn that societal expectations impose restrictions on when and where this can happen. This stage marks a critical point where children begin to develop a sense of control and mastery over their bodily functions, as well as their broader...
4.7K
01:14Psychosexual Theory of Development
3.1K
Sigmund Freud's psychosexual theory of development suggests that early childhood experiences significantly shape personality and behavior. Freud proposed that development is discontinuous, occurring in five distinct stages, each defined by a focus on different erogenous zones. He believed that failure to resolve the conflicts specific to each stage successfully could result in fixation, potentially influencing behavior as adults.
The Five Stages of Psychosexual Development
Freud's psychosexual...
The Five Stages of Psychosexual Development
Freud's psychosexual...
3.1K
01:16Psychosexual Stages of Personality: Oral
3.6K
The oral stage is the initial phase of Sigmund Freud's theory of psychosexual development, occurring from birth to approximately 12 to 18 months. During this period, the infant's mouth serves as the primary source of pleasure, with actions such as sucking, chewing, biting, and drinking playing a crucial role in reducing tension. These activities are essential not only for nourishment but also for the infant's psychological and emotional satisfaction.
Weaning, typically occurring...
Weaning, typically occurring...
3.6K
01:21Accessory Structures of the Skin: Sebaceous Glands
5.1K
A sebaceous gland is a type of oil gland found almost all over the skin ( except palms and soles) and helps lubricate and waterproof the skin and hair. Most sebaceous glands are associated with hair follicles. They generate and excrete sebum, a mixture of lipids, onto the skin surface, thereby naturally lubricating the dry and dead layer of keratinized cells of the stratum corneum, keeping it pliable.
These glands that produce the oils on the skin and hair are holocrine glands. The mature...
These glands that produce the oils on the skin and hair are holocrine glands. The mature...
5.1K
01:16Psychosexual Stages of Personality: Latency
1.4K
Following the phallic stage in Freud's theory of psychosexual development, children enter a phase called the latency period, which lasts from approximately six to twelve years of age. Unlike earlier stages, where sexual impulses played a central role, Freud believed these impulses are repressed during the latency period, becoming part of the unconscious. This stage is often described as a time of psychological calm after the turbulence of the phallic stage.
The latency period is not...
The latency period is not...
1.4K