Как-то так: (
jsfiddle.net/DelphinPRO/vfhcdu2q/ )
<div class="bubble">
<div class="bubble-in">
Lorem ipsum dolor sit amet, consectetur adipisicing elit. Fugit ipsa quisquam deserunt rerum repellendus consequuntur iste inventore et dolorum natus. Suscipit saepe facilis fugit reprehenderit earum. Quibusdam expedita iusto mollitia!
</div>
</div>
.bubble {
width: 300px;
border-radius: 15px;
border: 3px solid #1AA0D2;
display: inline-block;
position: relative;
}
.bubble::after {
content: '';
width: 39px;
height: 50px;
border-left: 3px solid #1AA0D2;
border-bottom: 5px solid #1AA0D2;
position: absolute;
bottom: -20px;
left: 40px;
background: white;
transform: skewX(-30deg) skewY(-48deg);
}
.bubble-in {
border-radius: 12px;
padding: 30px;
background: white;
position: relative;
z-index: 2;
}
