My husband has been experiencing sensations of gnats etc on his skin. initially he would ask everyone if they were feeling these too. what to do?

See doctor: The skin sensation may be a manifestation of vitamin deficiency. If your husband drinks alcohol, he should stop doing that. It would be prudent to consult a doctor for examination and may be some tests. For good health - Have a diet rich in fresh vegetables, fruits, whole grains, milk and milk products, nuts, beans, legumes, lentils and small amounts of lean meats. Avoid saturated fats. Drink enough water daily, so that your urine is mostly colorless. Exercise at least 150 minutes/week and increase the intensity of exercise gradually. Do not use tobacco, alcohol, weed or street drugs in any form. Practice safe sex.