Clinical nail damage, consisting of hyperkeratosis, onycholysis, onychoschizia
, and pachyonychia, appeared in 5 of the 47 patients (11%).
The most common nail finding observed was melanonychia [Figure 3], which was seen in 74 (37%) patients followed by onychoschizia
[Figure 4], Muehrcke's lines, Mees' lines and Beau's lines.
Onychophagia-induced melanonychia can accompany other trauma-induced nail changes, such as distal nail plate splitting, onychoschizia
, and nail plate hypertrophy .
Treatment of brittle fingernails and onychoschizia
with biotin: scanning electron microscopy.
The nail changes found out in this study were pitting, subungual hyperkeratosis, onycholysis, Beau's lines, onychoschizia and longitudinal melanonychia (Table 1).
Only one case each of lichen striatus, pityriasis rubra pilaris and pityriasis rosea was reported of which onychoschizia of fingernail was observed as the only change in all these cases.
The nail changes in our study were onycholysis and onychoschizia, all with involvement of fingernail alone.