Common nail issues include brittle nails, which can become dry and break easily. This condition may result from environmental factors, such as frequent exposure to water or harsh chemicals, or from nutritional deficiencies, particularly a lack of biotin or protein. Another frequent problem is fungal nail infections, which can cause nails to become discolored, thickened, or even crumble. These infections often occur in warm, moist environments and can be more common in individuals with diabetes or weakened immune systems. Proper hygiene and treatment are essential to manage these conditions effectively.