Thick Nail – Patient Information

What is Thick Nail? 

Onychauxis refers to an abnormal thickening of the fingernails or toenails without the presence of a fungal infection. The nails may become white, yellow, or discoloured, and can sometimes curl or lift away from the nail bed as the condition progresses. 

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Common Causes 

• Aging: One of the most common causes; nail growth slows and thickens over time 
• Repeated trauma or pressure: Common in athletes or from tight shoes 
• Underlying medical conditions: 
  • Psoriasis 
  • Poor circulation (peripheral vascular disease) 
  • Eczema 
  • Lichen planus 
• Genetic predisposition
• Nail neglect or long-term improper care  

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Symptoms 

• Increased nail thickness (vertical buildup of the nail plate) 
• Discoloration (often white, yellow, or opaque) 
• Possible curvature or deformity 
• Separation of the nail plate from the nail bed (onycholysis) 
• May cause discomfort when wearing shoes or during trimming 

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Treatment 

• Regular trimming and filing by a Foot Health Professional to reduce thickness 
• Footwear adjustments to relieve pressure on affected nails 
• Soaking and softening the nails before trimming 
• Medical nail debridement (filing or thinning of the nail by a specialist) 
• Monitoring for signs of secondary fungal infection