Skin diseases A-Z Skin diseases L – O Nail abnormalities February 24, 2025 / August 12, 2026 by Dick van Gerwen | Leave a Comment Common Nail Abnormalities and Their Symptoms: Fungal Nails (Onychomycosis) Yellow, brown, or white discoloration of the nail. Thickened, brittle, or crumbly nail. The nail may detach or become deformed. White Nails (Leukonychia) White spots or streaks on the nail. Usually harmless and caused by minor trauma. Sometimes a sign of protein deficiency or certain diseases. […] Read more » Brittle nails Dark discoloration Fungal nails Ingrown nail Leukonychia Melanonychia Nail loss Nail psoriasis Nail thickening Onychocryptosis Onychogryphosis Onycholysis Onychomadesis Onychomycosis Onychorrhexis White nails
Skin diseases A-Z Skin diseases L – O Lymphomatoid Papulosis February 17, 2025 / August 12, 2026 by Dick van Gerwen | Leave a Comment How does it develop?The cause is unknown. What is the treatment?The dermatologist can establish the diagnosis through a skin biopsy if lymphomatoid papulosis is suspected. Lymphomatoid papulosis is a chronic condition that cannot be cured. The skin lesions come and go. In extensive cases, temporary improvement may be achieved with light therapy (UVB). If the […] Read more » Benign skin disorder Chronic skin condition Dermatological condition Inflammatory skin reaction Lymphomatoid papulosis Nodules on skin Rare skin disease Red bumps on skin Skin lymphoma Spontaneously healing skin rash
Skin diseases A-Z Skin diseases L – O Lip licker’s dermatitis February 10, 2025 / August 12, 2026 by Dick van Gerwen | Leave a Comment Symptoms: Dry, cracked skin: The skin around the lips becomes dry and cracked due to constant licking. Redness and inflammation: The area around the lips may become red and irritated. Peeling and scaling: The skin may show flaky or scaly patches. Pain or tenderness: The affected area may be painful, especially when touched. Thickening of […] Read more » Chronic lip licking Dry lips Eczema around the mouth Inflamed skin on lips Lip-licking eczema Skin irritation at mouth corners
Skin diseases A-Z Skin diseases L – O Skin diseases P – R Pseudoacanthosis Nigricans January 30, 2025 / August 12, 2026 by Dick van Gerwen | Leave a Comment Symptoms The main symptoms of pseudoacanthosis nigricans include: Darkening and thickening of the skin in body folds. A velvety texture of the affected skin. Itching or an irritating feeling may sometimes occur. These symptoms develop gradually and can be cosmetically displeasing but are usually not painful. Causes Pseudoacanthosis nigricans is often associated with insulin resistance […] Read more » Acanthosis nigricans Black skin spots Causes of hyperpigmentation Condition of the skin folds Dark skin patches Hyperpigmentation Increased skin thickening Pseudoacanthosis nigricans Pseudoacanthosis nigricans treatment Rare skin condition Skin condition Skin condition in folds Skin disease Skin pigmentation change Thickened skin Thickened skin in folds
Skin diseases A-Z Skin diseases L – O Lentigo solaris January 22, 2025 / August 12, 2026 by Dick van Gerwen | 1 Comment on Lentigo solaris What is a lentigo? A lentigo (synonyms: age spot, liver spot, sunspot; plural: lentigines) is a benign pigmented spot that commonly appears later in life on sun-exposed areas of the skin, such as the face, chest, and the backs of the hands. People with fair skin are more likely to develop lentigines. There is a […] Read more » Age spots Benign pigmentation Brown spots on the skin Lentigo solaris melanoma Pigmentation spots skin aging Skin care sun protection Sun-damaged skin Sunspots UV damage
Skin diseases A-Z Skin diseases L – O Neurofibroma January 15, 2025 / August 12, 2026 by Dick van Gerwen | Leave a Comment Symptoms Soft, skin-colored, or light brown bumps on or under the skin Can vary in size from a few millimeters to several centimeters Usually painless but may be sensitive to pressure Sometimes causes itching or tingling sensations on the skin Can appear anywhere on the body, including the face, back, and limbs Larger neurofibromas may […] Read more » Benign nerve tumor Connective tissue nerve tumor Nerve tissue fibroma Nerve tissue growth Nerve tumor Neurofibroma Neurofibroma treatment neurofibromatosis Neurofibromatosis of Recklinghausen Neurofibromatosis type 1 Skin lesion from nerve tissue Skin neurofibroma Tumor from nerve tissue
Skin diseases A-Z Skin diseases L – O Urticaria Pigmentosa January 6, 2025 / August 12, 2026 by Dick van Gerwen | Leave a Comment Skin manifestations: Red-brown bumps ranging from 1 to 5 cm (mastocytoma) Red-brown spots or bumps on the skin (mastocytosis) Bumps that swell, turn red, and itch when rubbed Blisters on the skin Hives (urticaria) Persistent brown discoloration after redness fades General complaints: Hot flashes Dizziness Nausea and vomiting Headaches Palpitations Tingling Diarrhea Fainting Mastocytosis of […] Read more » Allergic skin reaction Itchy skin Mast cells Mastocytosis Rare skin disease Red spots on the skin Skin mastocytosis Skin rash Systemic mastocytosis urticaria pigmentosa
Skin diseases A-Z Skin diseases L – O Lipoma November 25, 2024 / August 12, 2026 by Dick van Gerwen | Leave a Comment Symptoms Lipomas usually do not cause complaints but can be recognized by: A soft, round, or oval lump under the skin. Easily movable when pressed. Painless unless the lipoma presses on a nerve or blood vessel. Slow growth, often over several years. Usually small, between 1 and 5 cm, but some can grow larger. In […] Read more » Benign fatty lump Benign tumor Fat accumulation under the skin Fatty tumor Lipoma Soft subcutaneous lump
Skin diseases A-Z Skin diseases L – O Edema due to other diseases November 25, 2024 / August 12, 2026 by Dick van Gerwen | Leave a Comment Symptoms Swelling of the skin, especially around the ankles, feet, hands, or face Tenderness or a heavy feeling in the affected area Tight, shiny skin that may leave an indentation when pressed (pitting edema) Limited joint mobility due to swelling Rapid weight gain due to fluid retention Shortness of breath or difficulty breathing (in cases […] Read more » Chronic edema from disease Disease-related swelling Edema due to other diseases Edema from cancer Edema from diabetes Edema from heart failure Edema from infection Edema from inflammatory conditions Edema from kidney diseases Edema from liver conditions Edema from underlying conditions Edema from vascular diseases Lymphedema due to disease Secondary edema Treatment for disease-related edema
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 L – O Lyme Disease September 8, 2024 / August 12, 2026 by Dick van Gerwen | Leave a Comment Symptoms Symptoms of Lyme disease vary depending on the stage. Early signs include erythema migrans along with flu-like symptoms such as fatigue, fever, muscle, and joint pain. In later stages, severe neurological and joint issues can develop. Causes Lyme disease is caused by the Borrelia burgdorferi bacteria, which is transmitted through tick bites. Not every […] Read more » Bacterial infection borrelia Chronic Lyme Lyme borreliosis Lyme disease Lyme rash Lyme symptoms Neurological symptoms Lyme Red ring on the skin Tick bite
Skin diseases A-Z Skin diseases L – O Larva Migrans May 31, 2024 / August 12, 2026 by Dick van Gerwen | Leave a Comment Symptoms Itchy red rash. Visible winding lines under the skin. Swelling and irritation. Rarely coughing and abdominal pain if the larvae reach internal organs. Causes Contact with contaminated soil or sand where larvae may be present. No direct transmission from person to person. Diagnosis Based on characteristic skin appearances. Medical history and possible recent contact […] Read more » creeping eruption cutaneous larva migrans ground itch hookworm dermatitis migratory helminth infection plumber's itch sandworm disease serpiginous dermatitis