<div class="row">
                            <div class="col-sm-12">
                                <div class="form-group">
                                    <label for=""> Tiene Seguro</label>
                                    <select name="seguro" id="seguro">
                                        <option value="1" @if($user->seguro==1) selected @endif>SI</option>
                                        <option value="2" @if($user->seguro==2) selected @endif>NO</option>
                                    </select>
                                 </div>
                            </div>
                        </div>

<div class="row" id="tipoSeguro" style="display:none">
                            <div class="col-sm-12">
                                <div class="form-group">
                                    <div class="form-check">
                                        <label class="form-check-label"><input  class="form-check-input" name="tipo" type="radio" value="1" @if($user->tipo_seguro==1) checked @endif>Médico - Dental</label>
                                    </div>
                                    <div class="form-check">
                                        <label class="form-check-label"><input class="form-check-input" name="tipo" type="radio" value="2" @if($user->tipo_seguro==2) checked @endif>Otros</label>
                                    </div>
                                </div>
                            </div>
                        </div>

<script>
    $(document).ready(function (){
        $('#seguro').append(function (){

            if($(this).val()==1){
                $('#tipoSeguro').show();
            }else if($(this).val()==2){
                $('#tipoSeguro').hide();
            }else if($(this).val()==""){
                $('#tipoSeguro').hide();
            }

        });
     });
</script>

<select name="seguro" id="seguro">
    <option selected>---</option>
    <option value="1">SI</option>
    <option value="2">NO</option>
 </select>


<script>
    $(document).ready(function (){
        $('#seguro').on("change", function (){

          let event= event.target.value; //Event tomara el value que tenga cada etiqueta <option>

            if(event==1){
                $('#tipoSeguro').show();
            }else if(event==2){
                $('#tipoSeguro').hide();
            }
        });
     });
</script>