The Bible tells us why some aren't healed, but if you talk about it people get mad at you.
1. Unbelief - "6 But he must ask in faith, without doubting, because he who doubts is like a wave of the sea, blown and tossed by the wind. 7 That man should not expect to receive anything from the Lord."(James 1:6,7) Some people will bash me for saying this, but the Bible clearly tells us that unbelief can hinder us from receiving from God.
2. Sin - "19 By this we shall know that we are of the truth and reassure our heart before him; 20 for whenever our heart condemns us, God is greater than our heart, and he knows everything. 21 Beloved, if our heart does not condemn us, we have confidence before God; 22 and whatever we ask we receive from him, because we keep his commandments and do what pleases him." (I John 3:19-22) Just as with #1, people don't want to hear this but we have to abide by God's moral code in order to ask in faith.3. Strife - "Likewise, husbands, live with your wives in an understanding way, showing honor to the woman as the weaker vessel, since they are heirs with you of the grace of life, so that your prayers may not be hindered." (I Peter 3:7)
4. Not Discerning the Lord's Body - "27 Whoever, therefore, eats the bread or drinks the cup of the Lord in an unworthy manner will be guilty concerning the body and blood of the Lord. 28 Let a person examine himself, then, and so eat of the bread and drink of the cup. 29 For anyone who eats and drinks without discerning the body eats and drinks judgment on himself. 30 That is why many of you are weak and ill, and some have died." (I Cor. 11:27-30) We can fail to discern the Lord's body through not respectfully observing communion, or by not showing love toward the brethren, or by not realizing that the Lord bore our sicknesses along with our sins on the cross.
5. Ignorance (about how faith works or God's will in healing) - "6 My people are destroyed for lack of knowledge ..." (Hosea 4:6) The more we learn about our rights and privileges as children of God and how faith works the better we'll be equipped to appropriate by faith what God has provided for us.
Likewise, husbands, live with your wives in an understanding way, showing honor to the woman as the weaker vessel, since they are heirs with you of the grace of life, so that your prayers may not be hindered.Likewise, husbands, live with your wives in an understanding way, showing honor to the woman as the weaker vessel, since they are heirs with you of the grace of life, so that your prayers may not be hindered.