Hyperthyroidism
When the thyroid gland is excessively activated, it can cause heat sensitivity because of the presence of thyroid glands in the bloodstream. In some cases, flushing and excessive sweating are seen.
Other popular symptoms of hyperthyroidism are:
- Irritability
- Anxiety
- Thinning or brittle hair
- Increased bowel movements
- Insomnia [6]
- Muscle weakness
- Missed menstrual cycles
- Increased heart rates
- Unintentional weight loss
Multiple Sclerosis
Multiple sclerosis (MS) may also lead to heat sensitivity in some people. Initially, you may observe blurry vision and feverishness. But heat sensitivity can also cause more nerve damage and other neurological signs.
The most popular signs of MS include:
- Vision changes
- Sexual dysfunction
- Pain
- Excessive fatigue
- Mental health issues
- Muscle spasms
- Feelings of tingling and numbness
- Speech difficulties
- Issues with thinking and learning
- Issues with movement and balance
- Bowel and bladder concerns