Discomfort and Mild Swelling of Lymph Nodes in the Groin Area
Hello everyone. I'm a 24-year-old woman, standing 5'7" and weighing 130 lbs. At the moment, I'm on Macrobid due to a history of urinary tract infections. I don’t smoke or drink alcohol, and I’ve been experiencing some discomfort since I awoke this morning. I decided to reach out for some opinions, as I tend to worry about my health and would like to determine if my concerns are unwarranted. To provide some context, I recently began treatment for a UTI and started taking Macrobid yesterday. Since this morning, I’ve noticed that my lymph nodes on the left side of my groin are not only painful but also slightly swollen—enough for me to see a difference. They are tender when touched, and their size is comparable to that of a pea or a small blueberry. Additionally, I suffered a severe headache last night after work and now sense that I might be developing another one. Could this discomfort be related to my UTI? Is it possible that an adverse reaction to Macrobid might result in swollen lymph nodes in the groin area? I have taken this medication previously without issues, and the only antibiotic to which I have an allergy is clindamycin. I appreciate any input you might have. Thank you!
Answers (1)

8/14/2025, 9:11:11 PM
OpenHealth AI
You’re clearly experiencing some discomfort with swollen lymph nodes in your groin and a headache, which can understandably cause concern. Let's break this down and prioritize some steps to help you with your symptoms.
Overview
Swelling and tenderness of lymph nodes can occur as part of your body's response to an infection, which could potentially be related to your urinary tract infection (UTI). While it's not typical for Macrobid (nitrofurantoin) to cause lymph node swelling directly, any infection or inflammation in the body can lead to changes in lymph nodes as part of the immune response.
Explanation
Lymph nodes help your body fight infections, and when you have a UTI, it's possible for nearby lymph nodes to react. Milder headaches can also occur for several reasons, including dehydration or tension, especially if you're feeling stressed or if you've had a long day. Given that you've recently begun antibiotic therapy, it's unlikely that you're experiencing an allergic reaction to Macrobid given your prior tolerance, but any medication can cause side effects.
Next Steps
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Hydration: Make sure you’re drinking plenty of fluids, especially water, to stay hydrated, as dehydration can lead to headaches and may help reduce the UTI symptoms.
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Monitor Symptoms: Keep an eye on your lymph nodes. If you notice any changes in size, increased tenderness, or if you develop a fever, these could be signs of a more significant reaction or complication that may require further attention.
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Pain Management: Over-the-counter pain relief could help with your discomfort. Ibuprofen or acetaminophen can be used to alleviate headache and discomfort, assuming you have no contraindications for these medications.
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Rest: Make sure to get enough rest while you’re recovering from your UTI. Stress and lack of sleep can contribute to headaches as well.
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Keep Track: Maintain a simple log of your symptoms, such as when the headaches occur and any changes in the lymph nodes. This information can help if you need to seek further advice later on.
When to Seek Help
If the swelling increases, if you develop a fever, experience severe pain, or if the headaches become more frequent or debilitating, it would be important to reach out for further evaluation.
It's normal to feel worried about unexpected symptoms, but giving attention to how your body responds and addressing issues thoughtfully can often lead to improvement. Please take care, and let me know if you have any further questions!
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