How to make a projectile do splash damage?

So I have a projectile that fires and whenever it hits an object I want it to do splash damage.

local TweenService = game:GetService("TweenService")
local TI = TweenInfo.new(0.5, Enum.EasingStyle.Linear, Enum.EasingDirection.InOut, 0, false, 0)

local properties = {
   Size = Vector3.new(20, 20, 20),
   Transparency = 0.5
}

local properties2 = {
   Size = Vector3.new(0, 0, 0),
}

local Tween = TweenService:Create(script.Parent, TI, properties)
local Tween2 = TweenService:Create(script.Parent, TI, properties2)

script.Parent.Touched:Connect(function(hit)
	if hit.Parent.Name ~= script.Creator.Value then
		script.Parent.Anchored = true 
		script.Parent.CanCollide = false
		Tween:Play()
		script.Parent.Blast:Play()
		Tween.Completed:Connect(function()
			Tween2:Play()
			Tween2.Completed:Connect(function()
				script.Parent:Destroy()
			end)
		end)
	end
end)

This script works fine and it allows the projectile to have a tween whenever it hits something where it starts increasing in size and covers an area, but for some reason whenever it increases in size, it does not deal damage to sorrounding players, why is this? The damage script fires inside the projectile with a Touched function (there is nothing wrong with the damage script as it works fine when you directly attack a player with the projectile instead of attempting to use splash damage).

.Touched isn’t the best at collision, which is why you can jump on .touched bricks and not be damaged. There’s two other ways for hit detection, which are: Raycasting and distance. If your hit box is a sphere I suggest doing distance because it’s the most easiest and quick one.

However, in your example code you didn’t check for a humanoid and take health from that humanoid, so maybe you just forgot to take health off?