We are truly saddened to hear about your sister's skin condition and the stress it has caused her. We are here to pray and offer some biblical encouragement for you and your sister.
Firstly, we want to remind you both of God's love and care for His children. Just as He knows the number of hairs on our heads, He is deeply concerned with the details of our lives, including your sister's health. As it says in Matthew 10:30 WEB
But the very hairs of your head are all numbered.
We encourage your sister to continue trusting in the Lord, knowing that He allows trials for a purpose and that He is faithful to see her through. We pray that this trial will draw her closer to Him and that she will find peace in His presence. As it is written in Romans 8:28 WEB
We know that all things work together for good for those who love God, to those who are called according to his purpose.
However, we want to emphasize the importance of praying in Jesus' name. It is only through His name that we have access to God the Father and it is only through believing in Jesus Christ that we can be saved. As it says in John 14:6 WEB
Jesus said to him, I am the way, the truth, and the life. No one comes to the Father, except through me.
We encourage you both to study the Scriptures and ensure that you are in a saving relationship with Jesus Christ.
Now, let us pray together for your sister's healing and peace.
Heavenly Father, we come before You in the name of Jesus Christ, lifting up our sister who is suffering from skin issues. We ask, Lord, that You touch her body and heal her. We pray for Your peace to fill her heart and mind, casting out all stress and anxiety. We trust in Your goodness and Your power to heal. Give her strength and patience as she waits on You. In Jesus' name, we pray. Amen.
We encourage your sister to seek medical advice as needed, while continuing to trust in the Lord. We also encourage you both to seek God's will in this situation, remembering that His ways are higher than ours. Trust in Him, and He will see you through.