امرأة عمرها ٣٢ سنة عندها تصلب متعدد منذ ٣ سنوات. تقول إن ضعف النظر والتعب والتنميل يزيدون بعد الاستحمام بماء حار أو عند الخروج في حر الصيف، ثم يرجعون كما كانوا بعد ما تبرد. الحرارة ٣٦٫٨. ما التفسير؟

A 32-year-old woman with MS for 3 years says her blurred vision, fatigue and tingling worsen after hot showers or going out in summer heat, then return to baseline once she cools. Temperature 36.8 °C. What is the explanation?

1. Hot water causes nerve inflammation
2. Heat temporarily slows conduction in damaged nerves
3. This is a new relapse needing steroids now
4. It is a sign of a bloodstream infection

Answer: B) Heat temporarily slows conduction in damaged nerves. Heat-related worsening (Uhthoff’s phenomenon) is temporary and settles with cooling, because heat impairs conduction in demyelinated nerves. Avoiding excess heat and hot water is advised.