not rlly because a trees skin is thick frm the outside unless u hammer the nail really deep then yes because they are living species an have cells as such...etc..etcIf i hammer a nail in a tree's trunk,, will it hurt the tree??
I grew up in the woods and have put more than my share of nails in trees. Never have I seen any adverse effects on any of them. In fact, most of those trees are still alive right to this day.
Why would you want to hammer a nail into a tree?
That depends on what the nail is made of and the size of the tree.
NORMALLY, no; but if you remove the nail, you should close the hole with a wooden plug to keep insects out in most cases.
trees got thick skins