Symptom Checker - Melanonychia 

​Differential diagnosis of melanonychia are :
-trauma
-Bowen’s disease
-Addison’s disease
-nail matrix melanoma
-basal cell carcinoma
-subungual keratosis
-lichen planus 
-pustular psoriasis
-pregnancy 
-nail matrix nevus 
-HIV infection 
-onychomycosis
-verrucae
-melanocyte hyperplasia
-HIV infection 
-medication ( doxorubicin,psoralen)