Stinging nettle is an herbal supplement prepared from the root of a leafy plant called Urtica dioica. This root extract may be beneficial in the treatment of hay fever and benign prostatic hyperplasia, a male health condition characterized by an enlarged prostate gland. Stinging nettle root is typically administered orally in capsule or tablet form, but may also be used as a cream, tincture or tea. Discuss the side effects of stinging nettle root side effects before you begin taking this supplement.
Stomach Irritation
Treatment with stinging nettle root supplement may irritate your stomach, leading to mild gastrointestinal side effects, the University of Michigan Health System reports. You may feel nauseated or experience frequent, loose bowel movements. Diarrhea may also occur in conjunction with stomach pain, fullness or cramping. Seek care from your physician if stomach irritation persists or becomes severe.
Edema
Fluid retention is a potential side effect associated with this supplement, the University of Maryland Medical Center warns. You may notice that your hands or feet appear unusually swollen after taking a supplement or using a cream that contains stinging nettle root. Fluid retention -- also called edema -- may make you feel bloated or you may notice that your clothing fits tighter than usual. Though this side effect typically diminishes over time, contact your doctor immediately if you experience significant swelling for any reason.
Skin or Allergic Reaction
Handling tablets, capsules or creams that contain stinging nettle root may irritate your skin. You may notice that your hands appear unusually red or inflamed. A burning, tingling or itching sensation may also develop across skin regions that come in contact with stinging nettle root. If you develop hives or a severe skin reaction after using stinging nettle root, seek prompt care from your physician.
Menstrual Changes
Women who use supplements that contain stinging nettle root may develop menstrual changes or problems. Pregnant women should not use or handle stinging nettle root as doing so may increase their risk of having a miscarriage, the UMMC advises. Consult your doctor if you miss your normal menstrual period or if the length of your normal period changes. Menstrual cycle changes may be signs of alternate health issues, such as pregnancy, ovarian cysts or hormonal problems.
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