I used to feel this way- ugly and self conscious because of it . It stemmed from comments my mother and boys at school used to make. It lead to low esteem and many bouts of self- hatred and tears.

One day, I came across that phrase that's more of a cliche "what matters most is how you see yourself". I thought about that, and attempted to see myself in a more positive light. I tried something that helped me like myself a little more, that I'll share with you. I hope it helps.

I went in front of a mirror and looked at myself- really looked. Take note of the things you don't like. For example: no, I don't have clear skin, but I do have nice eyes.
You've taken note of something positive that you like, and that will boost your confidence. Even if its just a little, it counts. Now take note of what you don't like and write it down.

Another example, hmm. I'm a little to thin/ slightly over weight, but I do have nice hair.

Using the first example, write down how you can highlight your positive feature, nice eyes can be highlighted with an eye-liner, or something like that.

Now, for what you don't like. Your skin for example. Ok, you've acknowledged that as an issue, then find ways to change it from there. Write down possible causes. Are you stressed that's affecting your skin, cool, let's focus on relaxing. Is it because of something else? Ok, let's find a solution to that. Exercise, more water and a good portion of fruit, and most importantly time will help your skin heal.

Next example, let's focus on the part that's upseting you. Weight. Ok. We've acknowledged that, now let's find ways to change it- diet change, less sugar, more fruit, more water and again time and patience.

These things will help you build your confidence.

But remember that true, pure beauty comes from within. It's really a waste to have great physical assets but an unkind heart.

I truly believe that no one on this Earth is ugly. We just need to make a few adjustments to how we view ourselves, and if someone else believes we're ugly because we don't have the perfect figure, or have a little flab, well to hell with them.

The important thing is that you are comfortable (the above tips as well as a few tweaks to your mindset will help with that) in your own skin and that you realise that you are a beautiful person. What matters most is how you see yourself. Someone else's opinion of your body doesn't count.

I hope this helps.

P.S.
You're not ugly, sweet. No one is.