Many of those in Spirit who have come through in private sessions have, in fact, described the sensations they give you when they visit - exactly like that - a warm tingle.
Deceased Loved Ones have often described the way they feel when they visit you, much like the way a warm sun feels on your back, after it's been cloudy for a while on a Spring Day.
This sensation, while common to Guides, Angels and Loved Ones, is only felt by Spirits visiting that you know personally (such as personal guides and loved ones) or those in Spirit who know you (such as ancestors and yet-to-be-met Guides and Angels). Thus, if you receive a warm tingle from Spirit, there's no need to be afraid!
If you feel a sensation like this, you've been visited by a one or many Spirits in a category of Spirits that I refer to as the,
Light Spirits are those who are fully crossed over, in the Divine Light, with the Source, the Oneness and present in a space known as Heaven. They are Spirit Guides, Angels, Fairies, and Deceased Loved Ones and Pets who have crossed. All of the Spirits in this realm are positive, loving, compassionate and kind - and usually, visiting you as a gesture to let you know they are with you, supporting you and validating your current life path.
If you have felt a tingle out of nowhere, with no other explanation to have felt one, such as a breeze, chances are, you've been visited by a Loved One, Spirit Guide or personal Guardian Angel.