Lets say your DA 270 and you need to go around above this altitude
Normally you would only go-around from DA if you don't meet the required visual references.
There is nothing to say you couldn't go all the way down if the decision to conduct a missed approach had already been made but there is no necessity.
If ATC instruct you or you don't meet your stabalised approach criteria well before DA then there is nothing wrong in quickly revisiting the missed approach instructions, talking through the procedure and then carrying it out.
You must never descend below the MDH/DH without proper visual references though.