Why are your toenails thick?

Onychomycosis

Onychomycosis is a fungal infection of the nail that can cause the nail to become thick, discolored, and brittle. It is the most common nail disorder, affecting up to 10% of the population. Onychomycosis is more common in older adults, people with diabetes, and people with a weakened immune system.

Trauma

Trauma to the nail can also cause it to become thick. This can occur due to an injury, such as stubbing your toe, or from repeated pressure, such as from wearing tight shoes.

Psoriasis

Psoriasis is a chronic skin condition that can affect the nails. Psoriatic nails can become thick, pitted, and discolored.

Lichen planus

Lichen planus is a rare skin condition that can affect the nails. Lichen planus nails can become thick, ridged, and brittle.

Nail biting

Nail biting can cause the nails to become thick and deformed.

Other medical conditions

Some other medical conditions can also cause the toenails to become thick, including:

* Diabetes

* Kidney disease

* Liver disease

* Thyroid disease

* HIV/AIDS

* Cancer

If you are concerned about the thickness of your toenails, it is important to see a doctor to determine the cause and get the appropriate treatment.