Can I Believe to Become More Physically Attractive?

That depends.

If you mean that you could be more attractive without a massive tumor hanging from your face, then yes, you can believe for healing and become more attractive, because you are redeemed from all forms of sickness.  You would look better without skin rashes, and they are covered by the redemption Christ purchased for you as well.  Many times, sickness makes people look awful, so being healed of such a sickness will make them look more attractive.

If you mean that you want God to make you look younger than your age, then yes.  Most people in our youthful-look-obsessed culture would consider you more attractive if you look younger once you get into middle age and old age.  This is something that God provides for His children – they should age more slowly and live longer than their unsaved counterparts.  He “renews your youth like the eagle’s” (Psalm 103:5).  Even in old age, you should be fit and flourishing (Psalm 92:13-14).  See Don’t Get Sick When You Get Old for more on this topic.

Abraham’s wife Sarah was too old to have children from a natural perspective, but after God promised Abraham children, Sarah suddenly became such a “hot babe” that Abraham lied about her because he was afraid that she was so good-looking that the ruler of Egypt would kill him to get her for his own!  That had to be quite a transformation.  There is no Bible promise of anything that drastic for everyone, but it did happen in her case!

We had an interesting sudden move of the Spirit along these lines in the church that we pastored in Maine after I was preaching along these lines.  People were told by outsiders and unbelievers (who had no axe to grind) that they suddenly looked 10 to 15 years younger.  (I remember being in a service 20 years before that happened where a prophet prophesied that the day would come when that would happen.)  I’ve been accused of lying about my age.  That is a good problem to have, believe me.  It would be nice to see Christians get “carded” all the time to make sure that they really qualify for senior discounts.  (At some restaurants, they may not care, as they just offer smaller portions for less money.)

If you mean that you could be more attractive if you lost weight, then yes.  God can help you do that.  (See Can I Believe for “Supernatural Weight Loss?".)

If you mean that you can suddenly look like Barbie so that you can get all the men around to ask you out when right now, they’re tripping over each other to ask your sister Voluptua for dates, I’m sorry to disappoint you.  I have yet to hear a testimony of a brunette with a large build transformed into a thin blonde bombshell in a service, and I don’t expect to hear such a testimony.  (I have met formerly brunette women who were dyeing to be blonde, but that was not supernatural.)  While you should look better than you “should” for your age, God has not promised to make you the cause of accidents because your looks are so good that carnal ill-mannered men turn around for a second look while they’re driving.  If that’s the kind of transformation you have in mind, YOU need a transformation – your mind needs to be transformed by the Word so that your thinking isn’t conformed to the world!  The world is obsessed with looks.  What really matters is being godly.  A WISE man will look for a godly woman, not the one who most resembles Barbie.  Proverbs 31:30 warns, “Favour is deceitful, and beauty is vain: but a woman that feareth the LORD, she shall be praised.”

I once asked the dean of a Bible School in another country, “What is the greatest cause of failure in the ministries of your graduates?”  (You have to be on decent terms with someone before you can ask questions like that.)  He told me, “Marrying for looks.”  He explained that many of the head-turner women his graduates had married ended up being a liability in the ministry because their hearts weren’t in it.  Eventually their ministries couldn’t continue because their wives were fighting their calling and they just settled into a mediocre life outside of the ministry.

And don’t get me started on women who post pictures of themselves in skimpy, revealing clothing on Christian dating websites.  If you fish using the wrong kind of bait, you’ll catch the wrong kind of fish.

I met my wife on a Christian dating site and she didn’t even have a picture on there.  After we first chatted, she put a horrible picture of herself on there.  It was sideways, off-center and awkward.  She then asked me, “So, what did you think of my picture?”  I said, “Well, it won’t win any photo contests.”  And she married me!  She did it ON PURPOSE to see if I was honest or a flatter-mouth!

I’m not saying that you could never find an attractive and godly person, but godly must be your priority or you could pay for it dearly.  My grandmother told me a long time ago, “Always remember, it’s better to go through life wishing you were married than to go through life wishing you weren’t!”  If a girl’s main asset is her looks, what will her husband do in 30 years when she doesn’t have those same looks, trade her in for a newer model?  (Jesus made it clear He wouldn’t approve of that trade-in.)

The first thing you should want in a spouse is commitment to Jesus, and if you’re smart, you’ll look for a spouse who feels the same way about a mate.  It’s not wrong to have an attractive spouse, but that should not be your first priority.

Some people ARE better-looking than others, and even God says so!

Job 42:15:
And in all the land were no women found so fair as the daughters of Job: and their father gave them inheritance among their brethren.

I still remember when a fairly well-known preacher got up and introduced his trophy wife, proclaiming how beautiful she was (and she WAS quite a “looker”).  Then to make things worse, he exhorted, “Guys, don’t buy no ugly truck!”  That was decades ago but I’ve never forgotten how utterly cringeworthy that moment was.  I wonder how many men decided they had to have a daughter-of-Job beauty queen after that and may have missed out on a wonderful godly prospective mate because their priorities were off.

I remember from my single days seeing the prettiest girl I’d ever laid eyes on – and she was interested in me and others were trying to set me up with her!  But she was not overall someone I should have married, and I’m glad to this day that I’m led by the Holy Spirit and not by my hormones.

Paul said, “In like manner also, that women adorn themselves in modest apparel, with shamefacedness and sobriety; not with broided hair, or gold, or pearls, or costly array; But (which becometh women professing godliness) with good works” (1 Timothy 2:9-10).  Peter said, “Whose adorning let it not be that outward adorning of plaiting the hair, and of wearing of gold, or of putting on of apparel; But let it be the hidden man of the heart, in that which is not corruptible, even the ornament of a meek and quiet spirit, which is in the sight of God of great price” (1 Peter 3:3-4).

So if you want to make yourself a “great catch,” the best thing you can do is develop your walk with the Lord.  Pray, read your Bible, serve in church, and let sinners know how to be saved.  That should be your primary emphasis, not your looks.  You don’t have to look dumpy, but some people spend a lot more time on their looks than on their walk with the Lord, and that’s not good time management.  Don’t buy into the world’s obsession with looks, and don’t look for someone who is obsessed with looks.  You could end up thanking yourself many times over!