What causes the intermittent stabbing pain from a boil?

Generally, episodic stabbing pain from a boil may be caused by local friction irritation, inadequate skin hygiene, folliculitis, furuncle (boil), or cellulitis. It is recommended to seek medical attention promptly, identify the underlying cause, and receive appropriate treatment under a doctor's guidance. Specific analysis is as follows:

1. Local friction irritation: Areas affected by boils are often irritated by clothing or accessories, causing friction that stimulates inflamed nerve endings and leads to stabbing pain. Wearing loose, breathable cotton clothing can help; avoid contact between the affected area and hard objects, minimize pressure on the lesion when sitting or moving, and apply a cold compress wrapped in a clean towel to relieve pain.

2. Inadequate skin cleaning: Dirt and oil on the skin surface can clog hair follicles, triggering infection and worsening inflammation, resulting in a stinging sensation. Clean the affected area and surrounding skin daily with lukewarm water, using mild, non-irritating bathing products. After washing, gently pat dry with a clean towel—avoid vigorous rubbing.

3. Folliculitis: Inflammation caused by infection of hair follicles with *Staphylococcus aureus* can stimulate surrounding tissues, leading to pain accompanied by redness and small papules. Follow medical advice to apply topical medications such as mupirocin ointment, fusidic acid cream, or clindamycin gel. Wash hands and clean the affected area before application.

4. Furuncle (boil): Acute suppurative inflammation of the hair follicle and surrounding tissue; deeper inflammatory infiltration intensifies pain, and a firm nodule may be palpable. In early stages, topical treatments such as ichthammol ointment, compound polymyxin B ointment, or erythromycin ointment may be used as directed by a physician. If abscess formation occurs, incision and drainage surgery are required to release pus and reduce pressure.

5. Cellulitis: Spread of boil-related inflammation into subcutaneous tissues causes widespread inflammatory response, expanding the area of pain and accompanied by redness, swelling, and warmth. Oral antibiotics such as cefuroxime axetil tablets, amoxicillin capsules, or levofloxacin tablets should be taken as prescribed. In severe cases, surgical incision and drainage may be necessary to remove the infectious focus.

Maintain a light diet, avoid spicy and irritating foods, and drink plenty of water to promote metabolism. Keep a regular sleep schedule, avoid staying up late, enhance immune function, and reduce the likelihood of skin infections.