Each year now ive noticed some red spots on my boob that show up around may/june and then it wil go away after a couple month but come back what is it?

Need to examine: It is not feasible to provide a meaningful opinion without examining you, however, what you described suggests heat rash at the beginning of warm weather. You may wish to adjust your clothing and bra in spring to provide better air circulation and lower temperature. Wish you 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, if you have sex. Get HPV vaccine