Help: Lose Health when miclicking

Unity Engine
1

I’m making a Rhythm game and trying to figure out how to write a function where if you hit the action button but the hitbox doesn’t collide with anything then the player loses a point of health. Here’s the current code.

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Hitbox_Trigger : MonoBehaviour {

    public IEnumerator DoAttack()
    {
        GetComponent<BoxCollider>().enabled = true;
        GetComponent<MeshRenderer>().enabled = true;
        yield return new WaitForSeconds(.1f);

        GetComponent<BoxCollider>().enabled = false;
        GetComponent<MeshRenderer>().enabled = false;
    }

    // Use this for initialization
    void Start () {

    }
   
    // Update is called once per frame
    void Update () {
        if (Input.GetKeyDown("z"))
        {
            StartCoroutine(DoAttack());

           
        }


      
    }

}

Any help is much appreciated. Thank you!

2

Do not enable/disable colliders. Instead, in OnTriggerEnter do count++ and in exit do count–, and when button is pressed, check if count == 0 or not