If a hard lump in a boy’s chest hurts when pressed, if it occurs in early childhood or adolescence, it may be due to the influence of estrogen during development, resulting in its own breast development, causing a hard lump in the chest and pain when pressed, which can usually be relieved by itself. If the breast lump is painful after puberty, it may be caused by breast or chest disease. 1, male breast development hyperplasia: due to diet, emotions, drugs and other factors lead to abnormal secretion of estrogen in men’s bodies, thus causing breast hyperplasia, part of the male can appear chest lumps and accompanied by pressure pain, serious tenderness; 2, chest folliculitis: due to male skin oil secretion, or The presence of endocrine disorders, blockage of the pores of the chest skin can form folliculitis, the chest will also appear small hard lumps and painful pressure; 3, chest lipoma: is the abnormal accumulation of fat in the chest resulting in benign tumors, may be related to high-calorie diet, alcohol abuse, etc., generally does not cause pain, but if combined with fat necrosis, may appear lumps hard and accompanied by painful pressure; 4, male breast fibroids. Breast fibroids may also occur in men with abnormal secretion of estrogen or increased sensitivity of breast fiber tissue to estrogen, and most breast fibroids cause hard lumps in the chest without causing pain, but in a few cases there may be pain when pressed; 5. Local hyperplasia: If scar tissue appears when a trauma heals, excessive hyperplasia may occur during the healing process, and men may press hard lumps in the chest at this time, and the wound may be accompanied by slight pain when it is not completely healed. When the wound is not completely healed, it may be accompanied by slight itching and pain; 6. Male breast cancer: when men have breast cancer, painless lumps often appear under the areola, which grow faster and the boundary is often unclear, and may be accompanied by skin changes on the chest and nipple overflow. It is recommended that men with hard lumps in the chest that are painful to press should seek medical attention in a timely manner to clarify the cause through hormone examination and ultrasound examination, and to carry out targeted treatment. At the same time, maintain good habits in daily life, avoid staying up late, try to quit smoking and drinking, you can eat more fresh vegetables and fruits, and eat less food rich in grease and hormones, such as fried chicken, snow clams, etc.