White spots on the skin - causes and treatment

What are white spots on the skin?

White spots are areas of the skin where loss of pigmentation is observed – a phenomenon in which the skin stops producing enough melanin, the pigment responsible for skin color. This process can be the result of a number of conditions – from mild fungal infections to more serious autoimmune diseases such as vitiligo.

Melanin is produced by cells called melanocytes, which under certain conditions can become damaged or destroyed. When this happens, the skin in the affected area loses its pigmentation and becomes lighter or even completely white.

Causes of white spots

The appearance of white spots on the skin can be caused by different factors – external, internal and hereditary. Most often, these are conditions in which the normal function of pigment-producing cells is disrupted.

1. Tinea versicolor (superficial fungal infection)

Tinea versicolor is a common fungal infection caused by yeasts of the genus Malassezia, which normally live on the skin. Under certain conditions – heat, moisture and reduced immune defenses – they grow excessively and cause the appearance of scaly white spots, usually on the chest, back, shoulders and neck. In most cases, the spots do not itch, but they are visible and stand out more clearly against tanned skin.

Tinea versicolor is especially common among young people and teenagers, particularly during the summer months, when excessive sun exposure creates ideal conditions for the infection to develop. Many people mistakenly think that these spots are caused by sunburn or vitamin deficiency, but the cause is fungal.

2. Vitiligo – an autoimmune skin disease

Vitiligo is a condition in which the immune system attacks the body’s own pigment-producing cells – the melanocytes. This leads to depigmentation of the skin, with clearly defined white areas most commonly forming around the mouth, eyes, hands and genital area. The exact cause of vitiligo is not fully understood, but there is often a genetic predisposition.

Although vitiligo is not contagious and is not life-threatening, it can have a strong impact on the psychological well-being of those affected, especially children and teenagers. Areas with vitiligo are more sensitive to sunburn and therefore require special care and photoprotection.

3. Idiopathic guttate hypomelanosis

This is a benign condition often observed in people over the age of 40. It is characterized by the appearance of small white spots on the arms, legs and face, usually on exposed parts of the body. The cause is damage to melanocytes from years of sun exposure. The spots are 2–5 mm in size, do not flake and do not cause discomfort.

This condition does not require treatment, but it can be reduced through regular use of sunscreen products and hydrating skincare.

4. White spots on the skin after sun exposure (sun spots)

Sun spots are areas of the skin where the skin tone visibly lightens after intense or prolonged sun exposure. The cause is associated with damage to melanocytes, which leads to spots with varying degrees of pigment loss.

Unlike skin hyperpigmentation, where pigment accumulates, as with brown sun spots, the epidermis here appears “discolored”. The most commonly affected areas are exposed parts of the body – the face, décolleté, arms and legs. The spots are smooth, do not itch or hurt, but can remain visible long after summer.

In people with fair and sensitive skin, the effect is even more noticeable. Repeated sunburns damage the pigment-producing cells more deeply, leading to uneven skin tone and permanent depigmentation in certain areas. These spots are not contagious, but they can be an indicator of skin damage that, in the long term, increases the risk of photosensitivity and skin diseases.

It is important to note that sunburn can damage the skin and lead to discoloration, which in some cases remains for a long time. In sensitive skin, this process may become more pronounced and lead to persistent spots.

Using high-factor sun protection and regular hydration is key to preventing such changes. Supporting the skin with antioxidants and protection from UV rays is the best strategy against this type of white spot caused by the sun.

Symptoms and how to recognize different types of spots

White spots may look similar, but their causes are often different. That is why it is important to observe additional symptoms.

• A rough, scaly texture is often a sign of a fungal condition;
  
  
• Smooth, clearly defined spots may suggest vitiligo;
  
  
• Small, oval spots that do not change over time may indicate hypomelanosis;
  
  
• Itching and irritation may indicate an infectious condition or an allergic reaction.
  
  

Location is also important – if the spots appear on exposed areas such as the face, arms and back, the likelihood that they are caused by the sun is very high. If they affect the area around the eyes or mouth, an autoimmune process may be possible.

Skin depigmentation in children

In children, white spots are usually the result of superficial infections, dry skin or eczema. One of the most common cases is pityriasis alba – a benign skin condition that appears as light areas on the cheeks and arms. It is most common in children between 4 and 16 years of age and is associated with sensitive skin and lack of moisture.

White spots in children can also result from contact allergies or the use of unsuitable cosmetics. Parents should regularly observe their child’s skin, especially after sun exposure, and use appropriate sunscreen products for children that are suited to their age and skin type.

When should you see a dermatologist?

If the white spots:

• grow quickly;
  
  
• spread across the body;
  
  
• are accompanied by itching, redness or pain;
  
  
• appear in children and do not disappear within 2–3 weeks;
  
  

А consultation with a specialist is essential. Some skin conditions may look harmless at first but can be a sign of impaired immune function or an infection that requires treatment.

Prevention and skincare

The best treatment is prevention. Maintaining healthy, protected and hydrated skin, following a balanced diet rich in vitamins and minerals, especially vitamins A, E, C and D, and avoiding excessive exposure to direct sunlight are key.

It is important to use quality sunscreen products even in winter, as well as regular care with specialized cosmetics for sensitive skin. At the first signs of change, do not postpone a visit to a dermatologist – early diagnosis is the best protection against complications.