Underarm hair removal options include hair removal creams and laser hair removal. Among them, hair removal creams are non-invasive and painless. Laser hair removal, on the other hand, involves a laser instrument that emits a certain wavelength of laser light, which penetrates the skin to reach the location of the hair follicle and destroys the root of the follicle, thus causing the hair to fall out and prevent new hair from growing. However, this method is only effective on the melanin-rich hair in the anagen phase and has little effect on the hair in the regressive or resting phase. Due to the small amount of energy used in the current photon treatment technology, underarm laser hair removal does not generally cause side effects. However, some effects can occur if care is not taken after the procedure, such as slight redness, skin sensitivity, pain, heat or itchiness in the hair removal area. It is important to note that underarm laser hair removal can only achieve a stable amount of hair regrowth in the treated area at a lower level than before for a period of 3-5 years after the treatment, but it does not completely eradicate it. In addition, the degree and amount of hair reduction varies from person to person, some people can achieve satisfactory results quickly, while others need more treatments than in regular cases to achieve hair removal results.