Mucous cyst https://en.wikipedia.org/wiki/Mucocele
Mucous cyst waa fiix ganglion benign oo lambar ah, oo caadi ahaan ku yaal kala-goysyada interphalangeal fog.

Macluumaad dheeraad ah ― Somali
References Digital Mucous Cyst 32644518 
NIH
Digital mucous cysts waa nooc ganglion ah oo inta badan lagu arko gacanta. Ganglion waa buro unug jilicsan oo ku ag taal kala goysyada ama seedaha. Digital mucous cyst ayaa si gaar ah uga soo baxa dhabarka dambe ee wadajirka interphalangeal fog (DIP joint) . Fiixyadani waxay inta badan la jiraan osteoarthritis ee xudunta hoose ee DIP.
Digital mucous cysts are a type of ganglion commonly found on the hand. A ganglion is a soft tissue tumor that is found next to a joint or tendon. A digital mucous cyst is a ganglion that arises from the dorsum of the distal interphalangeal joint (DIP joint). Digital mucous cysts commonly have an association with underlying DIP joint osteoarthritis.