Short answer
No, it is generally allowed. Microneedling treats acne scars, marks and skin texture, which counts as removing a blemish rather than changing Allah's creation. The conditions are that it is safe, that your awrah is not exposed, and that nothing impure is used, which is why many muftis advise against the PRP or "vampire" facial that uses your own blood.
Cosmetic skin treatments that remove scars, marks or blemishes are permissible, since they restore a normal look. A procedure must not expose the awrah or involve touching by the opposite sex without need, and impure substances such as blood should not be applied to the skin without medical need.
The four schools agree on this.
Explanation
The Prophet ﷺ told people to seek treatment, saying Allah has not created a disease without creating a cure for it. Scars, pitted acne marks, pigmentation and burn marks are defects, and treating them restores the skin to how it should look. That is different from what the hadith curses, such as tattoos and shaping the brows, which alter a normal feature to chase a look.
Microneedling itself. A device makes tiny punctures so the skin heals and renews. It removes nothing and adds nothing permanent, so Hanafi muftis treat it like other skin care and allow it, whether for scars or general skin health. Do not let treatments become an obsession or a waste of money.
PRP and the "vampire facial". Here your blood is drawn, spun and spread or injected into the face. Flowing blood is impure in the Hanafi school, and spreading it on the skin without real need is not allowed. Many muftis therefore advise ordinary microneedling with a serum instead. If a doctor recommends PRP for a genuine condition, ask a mufti.
Other conditions. A woman should be treated by a woman and a man by a man, since cosmetic care is not a necessity that lets a non-mahram touch you. Check that serums contain no pig-derived ingredients. If washing the face would harm it for a day or two, wipe over it with a wet hand in wudu instead.
For bigger procedures, see is cosmetic surgery haram and lip fillers and Botox.
Ask a mufti about your own case. This answer explains the general ruling. When the details of your situation matter, as they do here, ask a qualified mufti and give them the full facts. Where to ask a scholar.
The evidence
Quran, Surah An-Nisaa 4:119
وَلَأُضِلَّنَّهُمْ وَلَأُمَنِّيَنَّهُمْ وَلَءَامُرَنَّهُمْ فَلَيُبَتِّكُنَّ ءَاذَانَ ٱلْأَنْعَٰمِ وَلَءَامُرَنَّهُمْ فَلَيُغَيِّرُنَّ خَلْقَ ٱللَّهِ ۚ وَمَن يَتَّخِذِ ٱلشَّيْطَٰنَ وَلِيًّۭا مِّن دُونِ ٱللَّهِ فَقَدْ خَسِرَ خُسْرَانًۭا مُّبِينًۭا ﴿١١٩﴾
And I will mislead them, and I will arouse in them [sinful] desires, and I will command them so they will slit the ears of cattle, and I will command them so they will change the creation of Allah." And whoever takes Satan as an ally instead of Allah has certainly sustained a clear loss.
The line the scholars draw is between treating a defect and changing Allah's creation for vanity.
Sunan Abi Dawud 3855
Graded sahih... تداووا فإن الله عز وجل لم يضع داء إلا وضع له دواء ...
"Seek treatment, for Allah has not created a disease without creating a cure for it."
Treating a condition of the body, including the skin, is encouraged.
Sahih al-Bukhari 4886
Sahih... والمتفلجات للحسن المغيرات خلق الله ...
"...and the women who file their teeth for beauty, changing the creation of Allah."
The forbidden kind of change is altering a sound feature for beauty.
Where the ruling is recorded
- al-Fatawa al-Hindiyya, Kitab al-Karahiyya, chapter on medical treatment. Treating the body is permitted.
- al-Hidaya, Kitab al-Taharah, chapter on impurities and their removal. Flowing blood is impure.
Checked by our team. For a more accurate answer to your own situation, consult a scholar. Quran translation by Sahih International. Hadith Arabic from the standard editions of the six books and the Muwatta, with gradings as recorded there; the English is our own rendering. Spotted a mistake? Tell us.