I can't damage the player, why?

Every time I use my script:

script.Parent.Touched:Connect(function(tch)
	if tch.Parent:FindFirstChild("Humanoid") then
		tch.Parent.Humanoid.Health = tch.Parent.Humanoid.Health-math.random(1,10)
		wait(10)
	end
end)

I get the following error

Workspace.Part.DamageScript:3: attempt to perform arithmetic on field 'Health' (a userdata value)

If someone would help me I would be extremely grateful!

Try defining the humanoid first, and then using the :TakeDamage() event

script.Parent.Touched:Connect(function(tch)
local h = tch.Parent:FindFirstChild("Humanoid")

if h ~= nil then

h:TakeDamage(math.random(1,10))
wait(10)
end
end)

Hope this solved your problem, if not let me know we might be able to figure something else out.

I have made a script like that before but it slowkills or it can insta kill

function OnTouch(hit)
hit.Parent.Humanoid:TakeDamage(5)
    end
script.Parent.Touched:Connect(OnTouch)(hit)
	

should work you may get an error but thats only because the part might be touching the baseplate

This should work for all players:

local part = script.Parent
local debounce = true

part.Touched:Connect(function(tch)
	if tch and tch.Parent and game:GetService("Players"):GetPlayerFromCharacter(tch.Parent) and debounce == true then then
		debounce = false
		local human = tch.Parent:FindFirstChildOfClass("Humanoid")
		if human then
			human.Health = human.Health - math.random(1, 10)
		else
			print("Humanoid Does Not Exist")
		end
		wait(10)
		debounce = true
	end
end)

I'm using the GetPlayerFromCharacter(character) function of the Players Service to make sure that the object touched is from a player in the game

I'm using the FindFirstChildOfClass(ClassName) function to make sure you are accurately finding the Humanoid, as you may have changed the name of it.

The debounce is since you have a wait(10) I assume you only want this to run every 10 seconds.