The Quran is a book of guidance that provides principles that guide the development of knowledge in various disciplines. It does not go into details about each problem or disease. For instance, honey is described in the Quran as a cure but the details is left to us to research and discover its uses. About the honey, the Quran says:
There emerges from their bellies a drink (honey), varying in colors, in which there is healing for people. Indeed in that is a sign for people who give thought (The Quran, 16:69)
The Quran described the disease of Prophet Ayyub (Jacob) and its eventual cure. The Quran describes how Prophet Jesus cured chronic diseases. There are several means to getting healing such as spiritual healing, medicine, alternative medicine etc.. but it is Allah who cures, “Allah Huwa Al Shafi”.
Quran tells us that Prophet Ibrahim said: “And when I am ill, it is He (God) who cures me” Surah Ash-Shuara 26:80
For many decades our modern civilization has neglected the religious and spiritual aspects, but a number of recent scientific studies confirm the benefit from the Quran in treating various diseases specially stress, anxiety, fear, obsession, etc.. The results in 80% of the cases surpassed other psychological treatments.