Hi, thanks for writing to HCM.
Your symptoms of pain,discomfort and dark raised portion under the nail suggests 2 possibilities
* SUBUNGUAL HEMATOMA
- usually occurs after a crush type of finger nail injury
. Excruciating throbbing pain
is the main symptom. Needs drainage of the clot either by cautery or paper clip method.
* SUBUNGUAL GLOMUS TUMOUR - affects 30-50 years age groups.Aching pain with tenderness over a point, Pain will more at nights and on exposure to cool temparatures. surgical excision is the treatmentConsult a dermatologist
for further workup and management.
Hope this information is helpful.