Cell Update on Data Validation Selection

I'm using a DV List (in H100) to allow the user to select various options. If one particular option is selected from the DV List, I need to dispaly text in cell H98, which I'm doing using this code:

If Range("$H$100").Value = "Total" Then
    Range("$H$98").Value = "£'s Thousands"
Else
    Range("$H$98").ClearContents
End If

However, cell H98 won't show the text until cell H100 is not selected, i.e. until another cell is clicked. The same applies to clearing the cell as well.

Question
How can I get my text to appear as in H98 as soon as the relevant option is selected from the DV List without the user having to click another cell?

Hi Jeff,

This works perfectly, though I need to extend the code across ten columns as there is a DV List in each column and the value "Total" can be selected from any of them. I tried to extend your code to allow this to work for each column, what am I doing wrong? (I've only tried to add the second column below).

Private Sub Worksheet_Change(ByVal Target As Range)
    If Target.Address <> "$H$100" Then Exit Sub
    If Target.Value = "Total" Then
        Range("$H$98").Value = "£'s Thousands"
    Else
        Range("$H$98").ClearContents
    End If
    
    If Target.Address <> "$I$100" Then Exit Sub
    If Target.Value = "Total" Then
        Range("$I$98").Value = "£'s Thousands"
    Else
        Range("$I$98").ClearContents
    End If
End Sub

Jeff,

That works perfectly, many thanks once again for your help...