Acupuncture is a traditional East Asian Medicine (TEAM) or traditional Chinese Medicine(TM) practice that has been used for thousands of years. It involves the insertion of very thin, sterile needles into specific points on the body, known as "acupoints."
Acupuncture is most commonly used to treat pain, but it's increasingly utilized for overall wellness and a range of other conditions. Some of the conditions for which acupuncture has shown.

Acupuncture modifies an Energy flow in our body. With current science, we cannot explain 100%, so we can only explain acupuncture effects with the concept of Energy(氣 - 기,Chi,Qi). It can be understood as electricity flow in our body as one aspect. Therefore, Acupuncture changes the energy flow in our body.
Korean and Japanese acupuctures more are conceptual and explain better with the Energy flow. Korean acupuncture explains well with Five Element and Connection of Energy related with Five internal Organ(Heart, Liver, Kidney, Lung, Spleen) and 6 visceral organ(Stomach, Small Intestine, Large Intestine, Urinary Bladder, Gall Bladder, Triple Enerziger).
Acupuncture is not a magic, It can change the flow or energy in our body and solve issue with circulation. Acupuncture works very quickly in the pain area such as back and knee pain. However, acupuncture takes time to fix some diseases such as skin issues and gut issues. Once the change of structure occurs, the change of energy takes time to be effective to in the structure changes.
Actually, the acupuncture can apply all the problem or issue in our body. However, with some issue, acupuncture takes time to fix such as structural changes. Therefore, acupuncture is working very efficiently and quickly for the energy flow issue such as Mental Health, Indigestion, Pain, Women's issue, Stress related and unknown causes)
Acupuncture can apply to someone who doesn't want to use chemical to treat his/her health issues. It can also be used for treating chronic diseases.
Mental health
Digestion issues including Bowel Motion issues. - indigestion, strengthen digestion ability
Pain managment - back pain, hip pain, shoulder pain, knee pain, foot pain, heel pain, etc
Women's issue - period related pain. irregular period. fatigue or less amount of blood. Pregnant issue, IVF, menopause
Men's issues - prostate enlargemet, erectile issue, urination issues etc.
Chronic issues - cough, hayfever, asthma, pain
Immunity issues - auto immune diseases, low immunity
Acupuncture is not a magic. That means it is painful when inserting a needle. Some points gets more painful than other points. You need to try acupuncture at least once a week to get an effective.
Acupuncture is not as effect as other treatment for structural changes.
Acupuncture is very good for preventative medicine because it help energy flow in our body.