Reasons for Skin Tingling or Itchiness

1. Circulatory Changes

• Increased Blood Flow: Exercise or heat exposure (like in a sauna) causes blood vessels to expand, increasing circulation. This sudden change can lead to tingling or itching, especially in areas with poor circulation.
• Orthostatic Hypotension: Standing up quickly after resting can cause blood to pool in the lower extremities, leading to temporary tingling.

2. Nerve-Related Causes

• Nerve Compression or Irritation: Conditions like mild neuropathy or a pinched nerve (e.g., from lower back issues) can worsen with heat or movement, causing tingling in the feet and ankles.
• Diabetic or Pre-Diabetic Neuropathy: Insulin resistance can lead to mild nerve damage, which may become more noticeable with heat or activity.

3. Detox & Histamine Reactions

• Histamine Release: Heat and exercise can trigger histamine release, leading to itching—especially in those with histamine intolerance or mast cell activation syndrome (MCAS).
• Toxin Mobilization: Saunas help release stored toxins from fat cells, which can temporarily cause itching, particularly in individuals with high levels of heavy metals or environmental toxins.

4. Skin Sensitivity & Dryness

• Dry Skin (Xerosis): Heat and friction can irritate dry skin, making it feel itchy.
• Eczema or Dermatitis: Mild or undiagnosed skin inflammation can react to heat and sweat, causing an itch response.

5. Poor Lymphatic Drainage

• A sluggish lymphatic system (due to dehydration, toxin buildup, or lack of movement) may cause temporary tingling or itching as circulation improves with exercise or heat exposure.

6. Nutrient Deficiencies

• B Vitamin Deficiency (B12, B6): Can contribute to nerve-related tingling.
• Magnesium Deficiency: May cause nerve irritation and muscle tightness.
• Electrolyte Imbalances: Low levels of sodium, potassium, or overall hydration can lead to tingling, particularly during sweating.