Skin diseases A-Z Skin diseases P – R Porokeratosis January 31, 2025 / August 12, 2026 by Dick van Gerwen | Leave a Comment Symptoms The symptoms of porokeratosis can vary depending on the specific type of the condition but typically include: Clearly defined, ring- or disc-shaped patches on the skin. A raised, granular border surrounding the patches. Dry, scaly skin within the rings. Itching or irritation within the affected areas, although some types are asymptomatic. Causes The exact […] Read more » cryotherapy Genetic Skin Disorders Keratinization laser therapy Photodynamic Therapy Porokeratosis Rare Skin Conditions Ring-shaped Skin Lesions Scaly Skin Skin Biopsy Skin Irritation sun protection
Skin diseases A-Z Skin diseases L – O Nummular eczema November 25, 2024 / August 12, 2026 by Dick van Gerwen | Leave a Comment What causes nummular eczema? The cause of nummular eczema is unknown. It is often associated with dry skin, which can be caused by the use of soap or shower gel and dry air. Heredity is usually not a factor. In young children, atopic eczema can resemble nummular eczema (see the Atopic Eczema leaflet). Moisture retention […] Read more » Chronic eczema Coin-shaped eczema Dry skin patches Eczema on arms and legs Eczema treatment Itchy skin Nummular eczema Red patches on skin Scaly Skin Skin inflammation
Skin diseases A-Z Skin diseases H – K Keratosis Pilaris May 31, 2024 / August 12, 2026 by Dick van Gerwen | Leave a Comment Symptoms Small bumps: Usually on the upper arms, sometimes also on thighs, cheeks, or buttocks. Roughness: The skin may feel rough, similar to sandpaper. Itching: The skin may sometimes be itchy or irritated. Dryness: Especially in the winter months, the skin may feel drier and rougher. Causes Genetic factors: Keratosis pilaris is often hereditary. Keratin […] Read more » Bumps on legs Bumps on upper arms Chicken skin Follicular hardening Follicular keratosis Horny skin Itchy bumps Keratosis pilaris Keratosis pilaris treatment Red bumps on skin Rough skin Scaly Skin Skin condition on arms skin nodules Skin thickening Small bumps on the skin
Skin diseases A-Z Skin diseases P – R Parapsoriasis May 22, 2024 / August 12, 2026 by Dick van Gerwen | Leave a Comment Symptoms Red, scaly patches on the skin. Itching or irritation in the affected area. Thickened skin at the patches. Changes in skin color at the patches. Appearance of oval or elongated patches. Causes The exact cause of parapsoriasis is not fully understood. It is believed that a combination of genetic factors, immune system responses, and […] Read more » Chronic skin condition Loss of skin pigment Mild forms of psoriasis Mild parapsoriasis Parapsoriasis Parapsoriasis symptoms Parapsoriasis treatment Psoriasiform condition Psoriasis-like skin rash Scaly Skin Skin condition Skin damage from parapsoriasis Skin disease Skin patches Skin plaques Skin rash
Skin diseases A-Z Skin diseases D – G Erythrasma May 20, 2024 / August 12, 2026 by Dick van Gerwen | Leave a Comment Symptoms The main symptoms of erythrasma include: Flat, slightly scaly patches in the armpits or groins Colors ranging from pink to brown Itching or a slight burning sensation Patches that gradually enlarge Causes Erythrasma is caused by bacteria that thrive in warm, moist environments. People with diabetes or overweight are more susceptible to this infection. […] Read more » bacterial skin infection Chronic skin infection Complex skin condition Erythrasma Erythrasma treatment Reddish-brown spots Scaly Skin Skin damage from bacteria Skin disease caused by Corynebacterium skin infection Skin infection in skin folds Skin rash Skin rash in skin folds Sweat spots Tinea erythrasma
Skin diseases P – R Pityriasis Rubra Pilaris May 17, 2024 / August 12, 2026 by Dick van Gerwen | Leave a Comment Symptoms Pityriasis Rubra Pilaris (PRP) is characterized by red, scaly patches and thickening around hair follicles. These patches can spread and eventually cover large parts of the body, potentially leading to a phenomenon known as erythroderma. Itching and discomfort are common symptoms, but their severity can vary. Causes The exact cause of PRP is unknown, […] Read more » Chronic skin disease Keratinization disorder Pityriasis rubra pilaris Pityriasis rubra pilaris treatment PRP skin disease Rare skin condition Red patches on skin Scaly Skin Skin inflammation Thickened skin
Skin diseases A-Z Skin diseases P – R Pityriasis Rosea May 17, 2024 / August 12, 2026 by Dick van Gerwen | Leave a Comment Symptoms Pityriasis Rosea typically begins with a ‘herald patch,’ a larger round or oval pink spot, followed by smaller pink or red spots that spread across the torso, arms, and sometimes legs. Common symptoms include mild to severe itching and sometimes mild flu-like symptoms such as sore throat and fatigue. The rash usually lasts from […] Read more » Acute skin rash Herpes-like dermatitis Itchy skin rash Pink skin rash pityriasis Pityriasis Rosea Pityriasis rosea symptoms Pityriasis treatment Rosacea-like rash Scaly Skin Self-limiting skin disease Skin condition from pityriasis Skin disease Skin rash on the arms Skin rash on the legs Skin rash on the torso Viral infection-related skin rash$
Skin diseases A-Z Skin diseases P – R Pityriasis Alba May 17, 2024 / August 12, 2026 by Dick van Gerwen | Leave a Comment Symptoms Pityriasis Alba is characterized by round or oval light-colored, slightly scaly patches usually found in children and teenagers. The patches are noticeably lighter than the surrounding skin, can have a fine, dry texture, and often become more apparent after sun exposure. Causes The exact cause of Pityriasis Alba is unknown, but the condition is […] Read more » Dry skin patches Itchy skin spots Light pigmentation change Light skin spots Pigment loss Pityriasis alba Pityriasis alba care Pityriasis alba treatment Scaly Skin Skin condition from sun Skin condition in children Skin spots in children Skincare for pityriasis alba White skin patches White spots on the face
Skin diseases A-Z Skin diseases P – R Pityriasis Versicolor May 17, 2024 / August 12, 2026 by Dick van Gerwen | Leave a Comment Symptoms Pityriasis Versicolor is characterized by discolored patches on the skin, which can range from white, pink, salmon-colored to brown. These patches are usually found on the back, chest, neck, and upper arms. Some people experience mild itching, especially when warm or sweating, and the skin may be slightly flaky. Causes The condition is caused […] Read more » Fungal on the skin Fungal skin infection Fungal treatment Itchy skin Light or dark skin patches Pityriasis treatment pityriasis versicolor Pityriasis versicolor symptoms Scaly Skin Skin condition from fungus skin discoloration Skin discoloration after sun Skin discoloration from fungus Sun spots Tinea treatment Tinea versicolor
Skin diseases A – C Skin diseases A-Z Andrews-Barber Syndrome May 8, 2024 / August 12, 2026 by Dick van Gerwen | Leave a Comment Symptoms of Palmoplantar Psoriasis Symptoms of Palmoplantar Psoriasis vary from person to person but may include: Painful and itchy rash on the palms and/or soles. Formation of pus-filled blisters that can burst over time and form crusts. Redness and swelling of the affected skin. Thickening of the skin on the palms and soles. Possible cracks […] Read more » Andrews-Barber Chronic skin disease Cracks in the skin Itchy palms Palmoplantar Psoriasis Psoriasis on feet Psoriasis on hands Psoriasis Palmoplantaris Psoriasis treatment Red patches on palms Scaly Skin
Skin diseases A-Z Skin diseases S – Z Seborrheic Dermatitis May 6, 2024 / August 12, 2026 by Dick van Gerwen | Leave a Comment Symptoms Red skin Yellow or white scales Itching Rash in areas of high sebum production, such as the scalp, face (especially around the nose, eyebrows, behind the ears) and chest Oily skin patches Causes A yeast called Malassezia that lives in the sebum of the skin Genetic predisposition Hormonal changes or certain medical conditions can […] Read more » Dry skin patches Eczema from excessive sebum production Eczema on the face Eczema on the scalp Itchy skin Oily eczema Oily skin condition Scaly Skin Sebaceous disorder Seborrheic dermatitis Seborrheic eczema Seborrheic eczema treatment Skin condition due to oil Skin condition in folds Skin inflammation from sebum production Skin Irritation Skin rash
Skin diseases A-Z Skin diseases D – G Dehydrated Eczema April 25, 2024 / August 12, 2026 by Dick van Gerwen | Leave a Comment Symptoms Dry, flaky skin Itching, especially after showering or bathing Redness and inflammation Cracks or fissures in the skin Pain in deep fissures Causes Low humidity, especially during winter Aging skin reduces the production of fats and oils Excessive washing with hot water Genetic predisposition to dry skin and eczema Diagnosis Diagnosis by visual inspection […] Read more » Atopic eczema due to dryness Cold-induced eczema Dry eczema Dry skin eczema Eczema due to moisture deficiency Eczematous dryness Itchy skin Rough skin Scaly Skin Skin barrier damage Skin hydration Treatment for dry eczema Winter eczema xerosis Xerotic eczema