With blood under nail what are my treatment options?

Drainage. A partial nail removal or drilling a hole in nail to allow blood to drain out. This will release pressure and i, prove appearance.
Let heal or remove. You can let it heal by itself which may take from 1 to 12 months or a procedure such as nail removal if bad for drilling a hole through the nail could relieve it. Both sound bad but not as awful as they sounc.