When dealing with a headache, try boiling one cup of apple cider vinegar and one cup of water in a pot. Pour into a heat proof bowl and put on the table or other safe place that you can lean over the bowl and cover your head with a towel. Inhale the steam for a few minutes to bring some relief.
The warning on mine says not to use prior to 4 months of age. My son was in his Jolly Jumper from 3 months. The directions of use are that if they can confidently hold up their head then they are fine.
Developmental milestones at 4 to 7 months. Your baby is fully engaged with the world now: She smiles, laughs, and has babbling conversations with you. And she's on the move â by 7 months she can probably roll to her tummy and back again, sit without your help, and support her weight with her legs well enough to bounce when you hold her.