Help with player death on collision!

I have been trying to kill my player when he collides with another object in my game, its working but only the first time. When I respawn and walk back to the spikes he just stands on them like they were any other platform.
Here is my player script (Written in C#)

using UnityEngine;
using System.Collections;

public class Player : MonoBehaviour {

[System.Serializable]
public class PlayerStats {
	public int Health = 3;
}

public PlayerStats playerStats = new PlayerStats();

public int fallBoundary = -20;

void Update() {
			if (transform.position.y <= fallBoundary)
			DamagePlayer (500);
	}
public void OnCollisionEnter2D(Collision2D coll)
{
	if (coll.gameObject.name == "Spikes")
	{
		DamagePlayer (3);
	
	}
}
public void DamagePlayer (int damage) {
		playerStats.Health -= damage;
		if (playerStats.Health <= 0) {
		GameMaster.KillPlayer(this);
	}
}

	}

Any Help would be greatly appreciated :smiley:

Try attaching the a new script to the player with this inside it :

if(playerStats.Health <= 0)
    {
    Destroy(gameObject);
    }

you can do also

if (Health == -1) {                                   //can be Vector3
			transform.localPosition =new Vector2(1f,2f);
		}                                           //the position