If your baby can’t giggle at 6 months, it may be due to less communication, neurological, psychological and other developmental problems, and it is recommended to send them to the hospital for examination as soon as possible. Under normal circumstances, 4-month-old babies can already laugh out loud, 6 months can already send out words, syllables, if the 6-month-old can not laugh out loud, it may be the usual communication is less lead to, it is recommended that the usual observation of the baby’s reaction, more interaction with the baby talk, to promote the baby’s desire to communicate with the outside environment. However, we cannot rule out hearing impairment, autism and other diseases, it is recommended to go to the hospital to rule out the cause of the disease, if diagnosed as a result of the disease, should be treated as soon as possible, the earlier the treatment the more conducive to recovery.