Learn about the possible causes of changes in color, thickness, surface and shape of nails, the dermatological evaluation process and treatments planned according to the individual.
What are nail diseases?
Nails, like skin and hair, are part of dermatologic assessment. Changes in color, shape, thickness or surface can have many causes, including infection, trauma, skin disease and environmental exposure. Not every nail change should therefore be assumed to be fungal.
What changes can be seen in the nails?
Discoloration or other color changes, thickening or thinning, brittleness, cracking, striping, surface irregularities, malformation and separation of the nail from its bed can be noticed. Redness, sensitivity, pain or swelling around the nail may also accompany the condition. Since a similar appearance can occur due to multiple causes, it is not diagnosed with a single finding.
Possible causes of nail diseases
Possible causes include fungal infections and other infections, dermatological diseases such as psoriasis or eczema, inflammation around the nails, changes associated with certain systemic diseases, frequent contact with water or chemicals, improper care and manicure trauma, and certain medications. The number of nails affected, when the change began, and how it progresses are important in the evaluation.
Fungal nail disease
Fungal nail disease is an infection that can affect hand or foot nails. Changes in color, thickening, flaking, surface abnormalities or detachment from the bed can be seen in the nail. However, these findings are not exclusive to fungus; psoriasis and trauma-related changes may also look similar.
Is every yellow discoloration or thickening caused by fungus?
No. Even if the appearance suggests a fungal infection, the diagnosis should be evaluated with a history and examination, and if deemed necessary, a microscopic or laboratory examination of the nail sample may be required. This distinction helps prevent an unnecessary or inappropriate approach.
Other common nail problems
Inflammation around the nail fold
In the picture called paronychia, redness, swelling, sensitivity or pain may be seen in the nail fold. Since the causes of acute and long-lasting appearances may be different, they are evaluated together with the surrounding skin.
Changes due to dermatological diseases
Psoriasis can cause small pits, thickening, color change or separation on the nail surface. Eczema and some other inflammatory conditions can also affect the nail and surrounding tissue. Even if there are no obvious findings on the skin, nail changes may require a dermatological evaluation.
Trauma and fragility
Trauma, repeated pressure, nail picking, intensive manicure procedures, frequent wetting and chemical exposure can damage the nail structure. Brittleness alone does not indicate a specific disease; daily habits, associated symptoms and medical history are considered together.
How is dermatological evaluation done?
The evaluation begins with a history that includes the beginning and course of the change, care habits, trauma, medications used and accompanying health conditions. The nails and surrounding skin are examined. If there is a suspicion of fungus, a nail fragment or nail bed material can be examined microscopically or by laboratory methods; other tests are planned only when examination findings are necessary.
How is the treatment planned?
The approach to nail diseases is determined according to the cause of the change and the individual. The type of infection, the number and area of affected nails, accompanying diseases, medications used and daily contact can affect the treatment plan. In appropriate cases, local or systemic approaches can be considered; the decision on which option is necessary is made after examination. This page does not recommend a specific drug, dose, device or procedure.
Why might recovery take time?
Nails grow slowly. Even after the cause is controlled, the damaged portion needs time to grow out and be replaced by new nail. The rate of visible improvement varies between fingernails and toenails and with the extent of involvement and individual factors; no exact timeline or result can be guaranteed.
When should I consult a dermatologist?
Dermatological assessment is appropriate for persistent or progressive discoloration, marked thickening or shape change, separation from the nail bed, pain, redness, swelling or recurrent problems around the nail fold. A new or changing dark streak or spot should also be assessed promptly.
Frequently asked questions about nail diseases
Basic information about nail changes, suspected fungal infection, clinical assessment and individualized planning.
No. Fungal infection can cause discoloration; but trauma, psoriasis and other nail problems can also look similar. A dermatological evaluation and nail sample examination if necessary are needed for differentiation.
History and examination of the nails are the basic steps. If the appearance alone is not sufficient, the piece taken from the nail or the material under the nail can be examined microscopically or by laboratory methods.
Fungal nail disease can be permanent and may spread to other areas over time. Every appearance suspected of being fungal should be confirmed first; the need for observation or treatment should be determined according to personal findings.
Mushroom agents can be transferred through common surfaces or personal care tools. However, not everyone who comes into contact with them will develop an infection; nail trauma, moisture, and certain health conditions may affect the risk.
Duration; varies depending on the nail being treated, prevalence, cause, chosen approach and the growth rate of the nail. Since the nail grows slowly, even if the infection is controlled, visible improvement may take time.
Mushroom, repeated trauma, psoriasis and other nail diseases can cause thickening. Thickening does not indicate a cause on its own; it is evaluated together with other nails and surrounding skin.
Separation of the nail from the nail bed may result from trauma, infection, psoriasis, irritant exposure or other causes. The extent of separation and any associated color change or change in the surrounding skin are assessed during examination.
Frequent wetting-drying, chemical contact, care trauma and some dermatological or general health conditions can increase fragility. It is appropriate to evaluate the cause of recurrent breakage.
Some infections and dermatological diseases can affect both hand and foot nails. However, the location, growth rate, pressure from shoes and daily contacts can change the appearance and approach.
In permanent or progressive changes in color, thickness, surface and shape; evaluation is recommended in case of separation, pain, redness or swelling. New or changing dark lines and spots should not be delayed.