Subdermal needle implantation for contraception may lead to menstrual abnormalities, weight gain, vaginal bleeding, wound inflammation, and other hazards. Specific conditions should be consulted with a doctor for understanding. Here are some potential risks:

1. Menstrual Abnormalities

Subdermal needle implantation usually causes damage to the endometrium, often altering its thickness. This can lead to menstrual disorders, reduced menstrual flow, and in severe cases, amenorrhea.

2. Weight Gain

Subdermal needle contraception often contains hormonal drugs. Improper use may lead to changes in hormone levels, resulting in water and sodium retention. Clinically, this may manifest as weight gain, obesity, and edema.

3. Vaginal Bleeding

Subdermal needle implantation can cause changes in hormone levels, potentially damaging the endometrium and leading to irregular vaginal bleeding.

4. Severe Wound Inflammation

Subdermal needle contraception is a minimally invasive procedure. Improper postoperative care may lead to local inflammation, manifesting as redness, swelling, and pain. Additionally, allergic reactions may occur due to allergies to certain components of the contraceptive device. Clinically, this may manifest as chest tightness, rash, and other symptoms.

If patients experience any of the above symptoms, it is recommended to seek medical attention and undergo appropriate treatment under the guidance of a doctor. Proper daily care is also essential.